Originally Posted by
Zofis
Blizzard doesn't tend to cite server limitations as a reason for not implementing a particular feature. I've played and followed WoW since Vanilla and can only recall data storage being brought up by the devs on one occasion when players were requesting additional Void Storage space (which we eventually got).
That's not to say that WoW has never really had server limitations, I'm sure they have, it's just that Yoshida tends to be a bit more candid about XIV's storage issues. Any server limitations that WoW may have had at one point or another seem to be gone at this point though, considering the past expansion added additional Void Storage, a guild bank-esque reagent tab to the standard bank and greatly increased stack sizes. WoW is also getting an account-wide transmog (glamour) log in the next expansion to automatically save item appearances for later use.