In June, to be finalised in July at the latest, I will be moving my email accounts from Google Workspace (prev. Google Apps) to Migadu.
Likely I should document all this along the way.
Here's the brutally honest and readworthy Pro/Cons list for Migadu:
https://www.migadu.com/procon/
Yes I'm embarrassed to still be dependent on Google for this, but that's also why I'm happy this is finally happening.