I’ve been using my own domain pointed at Inbox.eu. They’re based in the EU and I haven’t had any problems, I pay for 2 users, the price is something like 12€ per user per year, so it’s cheap enough for me.

I’d say CPU doesn’t matter in terms of compatibility, but that AMD does have the edge at the moment on Intel in terms of performance, energy use, etc. Especially considering Intel’s problems with their 13th and 14th gen Core CPUs.

To add to this, I think in general AMD offers a bit better bang-for-buck at the moment, at least in the low and mid-tiers.