Let's say I'm tired of self-hosting my email (for all the reasons previously mentioned by others). What's a good option of privacy-conscious provider I can move my domains to?
I think ProtonMail (https://protonmail.com/) is the only one that comes close to being "privacy conscious," mainly because it's their entire focus. Any other non-major, non-free provider might be an alternative but they're probably not as focused on being proactive about the privacy element?