I have just changed from fastmail (Australian owned, but hosted in the US) to mailbox.org (German owned and hosted, as I understand it).
The reasoning is that I didn't want my email provider to be reliant on a US hosting service. This graphic has fastmail as a preferred choice though, and doesn't mention mailbox.org at all.
Any advice on how to move a server over to a matrix/element based setup?
I have a feeling there will be resistance to change, because many of the core people there seem to be discord fans and are longtime users.