It is, but there is a relay storing multiple versions of people's metadata now.
Actually we can just hardcode this relay on https://metadata.nostr.com/ and it will work great there I think.
Discussion
my relay is already storing multiple versions, because deleting is racy and it's more stable to not delete the events but just show the newest one
no coincidence a bunch of people over the last idk whole time of this protocol talking about losing their metadata... won't happen if there is relays keeping multiple versions and not deleting
Do clients need any special filters to return historic versions of replaceable events?