working through a potential migration to Pleroma, and it looks like there are a few roadblocks.
I can recreate all the accounts, password hashing is done differently so all users would have to make new passwords.
much migration code that exists depends on modules that exist in newer mastodon upstream (so ours would need to be migrated forward regardless).
lots of broken links will start showing up because internal DB IDs will change, since neither is using UUIDs.