I switched to proton mail about 3 months ago since I was already using proton VPN and pass and I’m very happy with it so far. If you use pass + mail you can easily create website-specific aliases (automatically or with a few button presses) so you don’t expose your own email, and if you start getting spam you’ll know exactly who sold your email.

Primary downside is that since all of your mail is encrypted, on mobile you can only use the official proton mail app, not any third party apps. On desktop there is a bridge app that lets you use others though (I personally use thunderbird)