I’ve been using Proton mail for almost a year now. For the most part, it has been great. I’ve thrown myself into the Proton ecosystem, using Pass, Calendar, and of course, Email. I also had tentative plans to move my VPN needs to Proton instead of re-upping Mullvad in the fall. On one hand, the ecosystem is fantastic. It all works well together, and does almost all the things I want it to do.
i don’t self host email too much hassle but ive used pop/imap tied to my domain and webhost for 25 years and never looked back. i do have a tuta account but it’s not my primary.