I have only ever used hosting providers in the US before, so I wasn’t aware of the documentation requirements for many of the EU providers. Did you have to migrate the object storage as well or was that fine to just stick to where it is as long as the pict-rs configuration and urls all point to the right place?

I have never personally done a big migration like this for any of the services I run as I have usually just done small scale stuff that only I or some friends use. So, in the past I have often just destroyed things and rebuilt from scratch or, at most, just copy/pasted some docker volumes to a new host. It is something I have been thinking about a bit as I am now hosting more publicly facing things like the anime wiki, the image hosting frontend for the clips I post (they get saved to object storage), and @rikka@ani.social which uses an sqlite database. I found that setting up rsnapshot to do hourly snapshots of rikka’s database has actually proven very useful for debugging issues (in addition to having a backup) because I can see the history of the database that led to the current state.

It seems like the migration is working as we made it through a Wednesday with no noticeable federation delays at all. Keep up the good work!