Protonmail is great. It has all features necessary but at the same time it's not creepy at all - like Gmail is.

Apart from that, in fact I have this long-term project to self-host all my stuff. So far I managed to do this only for my calendar (using Apple's CalDav server). E-Mail is my next goal but even if I have it running, I'll start transitioning slowly. After all I think it's not that much maintanance effort once it's setup as long as it's managed through Ansible or Docker.

Protonmail isn't bad, agree. But I don't like their mobile Android client because it can't group emails (each email even response is new one). But again I am using free version, so no complains. :)

Google mail is more feature-rich of course.

It's still cumbersome or close to impossible to move out of Protonmail along with one's emails. The IMAP support is still in beta, and has been under consideration for a few years now. The easiest way to move out of Protonmail is to abandon one's emails there and start afresh somewhere else.

Seconded - I am also very happy with ProtonMail.

Thirded, I too am quite happy enough with protonmail I decided to pay for their service.

Fourthed. I can see me transitioning, so far so good.

Here, as well. Very happy with protonmail.

I have a free Protonmail account set up since a couple of years back. But I found the lack of calendar always pushed me back to G Apps. I think the search functionality also was a bit lacking.

I've been using Protonmail for quite a while. It's excellent.