@julian @flancian @renchap Yes, the primary reason why full migration is not implemented is because it is very difficult to do (the solution I proposed is FEP-ef61; it probably needs at least a couple of years to mature before Mastodon can implement it). However, in some cases interactions don't need to be preserved, and various tools for working with Mastodon archives exist, for example https://posty.1sland.social/