My olympic pet got eaten in the Great Pet Catastrophe of Whatever Patch Account-Wide Pets Happened In (3.0 I think? It's been a long time). There was that bug where some pets would get learned and then forgotten immediately after, and you could put in a ticket to try to get them back but that wasn't a guarantee of success. I got my CE pets back (presumably because they could see that my account was flagged as a collector's edition), but they couldn't/didn't give me the Spirit of Competition back. Every time I see someone with him out, I feel bad—sad and angry and frustrated. I would give quite a lot of gold/time/whatever to get him back, especially now that pets are more than vanity items.
It's not their fault I feel like that (the person who got to keep the pet OR Blizzard. Well, okay, you COULD make an argument that it IS Blizzard's fault, but they did their best at the time), and I don't feel like that with every unobtainable item that I had and no longer have—I had the full mail version of the teal judgment recolour and deleted most of it for space, and I only really regret the chest/pants (the shoulders were hideous iirc, and not the teal judgment ones at all). Maybe that one's because I have the full plate version where the shoulders DO look like Judgment; I paid an obscene amount of money to faction+server transfer the paladin with it to my main server once transmog became A Thing (well, and also because we'd server transferred away from my original main-server paladin and I'd never created a new one, and the paladin with it was Horde on Stormrage which is the most miserable I've ever been on a PvE server in my LIFE).
I deeply regretted not farming a pair of Bloodmail legs on my hunter when I was prepping for Mists and the removal of those old versions of the instances (even though they said they'd try to bring back the old looks somewhere/sometime), because "I haven't played her seriously in years, she's still on Bloodscalp after how many years? What are the chances I'm gonna main swap to a
hunter?" I've been complaining about that for two years now, since my hunter DID become my main. But I'm still okay with not having the rest of the set or the plate version or any of the rest of it. I regret Alanna's Embrace, but I never got it to drop (and if I had it would probably have been on my shaman like my AQ dresses all were, grump grump). I regret the original ZG raptor but I was lucky enough to have seen ONE tiger drop after running it nearly every reset for years and the people I was running it with knew how much I wanted it and passed it to me. I would not have been able to afford it when it was added to the BMAH pool, as the only reason I was able to afford the reforge/transmog yak in MoP was that a guildie quit the game and sent me some of his gold (and the guild perk for vendor costs was still a thing). That probably would have changed by WoD; I would have gone MUCH harder on garrison gold making than I did, and I'm over 750k on my primary server right now. Not that it'd have done any good, it hasn't shown up on our BMAH once the entire expansion (nor has rogue t3 gloves or druid t3 belt GRUMP GRUMP GRUMP), but still.
Err. That sort of went off point. The point I was trying to make was, as someone who's been playing a looooong time, there's a lot of items that I've had or had the chance at that I regret not having held onto, but
there's just no helping it. My shaman hung onto some of her most-beloved tier sets as time went on but with the advent of transmog, deleting even the stuff she wasn't going to wear was risky—what if there was another untransmoggable legendary that had to be coordinated for? I'd already been burned by deleting a chest from a quest on Bloodmyst Isle (and an identical one from Nagrand) when I got DTR and needed a chestpiece that wasn't a coconut bra to coordinate with it; I didn't want to go through that again. It makes life on my mains very difficult and I am looking forward to the day that I can free up some of this space again. Nothing vital will be deleted for a good month or more, mind you—I've learned my lesson the hard way—but so much of this stuff is just "I MAY want it in the future," not "I WILL want it in the future."
I don't think unobtainable things should be status symbols, because I don't think there should be unobtainable vanity items. I love my Zulian Tiger; he matches my preferred transmog ridiculously well in addition to being my favourite ground mount in the game, but there are days that I feel bad about riding him because I remember how I feel about the Spirit of Competition, who is super tiny and not instantly recognizable at a distance. I know there's at least one guildmate who wanted it desperately and farmed almost as frequently as I did and still never got it to drop; I do my best not to ride it when he's around. He doesn't raid anymore and a lot of HFC is indoors (and if I mount up in the outdoor spots it's usually to repair) but what if there are other, active raiders who feel the same way? It bothers me. I don't mention it anymore when my guild leader's random pet addon brings out the Spirit of Competition; how many of the other seventeenish members of my raid group feel that way about my tiger? And so some days, I don't ride it at all.
And that
blows. I know a lot of people (the general populace, even) don't feel about those things the way I do; I know a lot of people will see me riding on it and assume I'm riding it because since it's unobtainable*, it's a status symbol. I have qualms about riding my Black Proto-Drake for the same reason. I won the roll on last week's Archimonde mount, which is the most common mount I see running around in beta right now. Granted, part of that is probably just because other mounts aren't quite as large and eyecatching, but a lot of it is because it's a status symbol. But think about it—Lifebinder's Handmaiden, the Twilight Drake, heck even the Kor'kron Juggernaut were all status symbols once. But you don't really see a lot of people riding them these days because their heyday has passed. The people who ride them now ride them, not because they're showing off, but because they like them. Even Invincible and Mimiron's Head and the Deathcharger's Reins, while still SORT of statusy, are still more in the "I'm riding it because I like it" camp nowadays.
About the only thing I can think of that would make it "fair" to reintroduce old removed items but NOT have them available to people who didn't "earn" them would be opening up certain items only to players whose accounts existed in the time periods those items were available. And, uh... I don't know about you, but I remember how angry and outraged people were about that orc statue and feel that "fair" has earned every pixel on those quotation marks, haha. Even the BMAH isn't a perfect solution, especially with gold cap going up (unless class halls are as good for gold as the garrison was—and that doesn't seem to be the case thus far). I'm much more interested in things like the Exile greens that were introduced on Isle of Thunder as a replacement for ZG/ZA stuff—visually identical, BoE greens that, while not super common, were not frustratingly difficult to come by.
(Note: since it got lost somewhere within that wall of text and all the editing I did on it, I don't think time-sensitive exclusivity is a bad thing—by all means have mythic and high-rating recolours or exclusive looks or vanity items. But there's always a time limit on that stuff on the PvE side and people who want the mythic versions can go back later and pick it up much more easily. PvP's different for some reason, as are vanity items like mounts.)