>Please note that Mastodon can move your followers, but it can’t transfer your old posts or uploaded media to your new account. If you want to keep a copy, download an archive

I'm sure there is some technical excuse to why this is the case but just seems entirely broken that it can't just have the owner of the account provably broadcast they control both the original and the destinations and to redirect all posts.

I mean the actual thing that has value IS the posts and there would be less burden on people shutting down these servers if you were not destroying that work by doing so.