Many thanks for that curated list

First thank you for the work (always keeping server up to date, fixing issues quickly, blocking spam,…).

Now time to think about migrating, any advices for another great instance?

You can also give a try to Waterfox. The main advantage, in my opinion, is that the privacy settings are not enforced like in librewolf but let to the user appreciation but telemetry from mozilla is removed as well.