It depends on how tech-savvy you are. I pay ~2€ a month to have an own domain hosted by "hetzner" (www.hetzner.com). You can create up to 100 Mailboxes under your own domain and are sure where your data is located. But that is not really viable for every person.
Absolutely! I have been waiting for it... Until it is out I will continue to use "FairEmail".
That's a pretty responsible approach to these issues. In my daytime job, I also sell whole systems to business costumers because it obviously is the more wise choice when prioritizing system uptime and replacements. But I also still have a soft side for custom hardware builds in private use cases, which cannot be satisfied with prebuilds :). But I also migrated mostly to a Laptop recently (used XMG Fusion 15) for daily use and light/medium gaming. Big plus is the portability, works like a charm on LAN parties.