Oh sorry! I mostly hated their VPN app on linux: it’s not like their VPN is a brand new service and still they can’t manage to make it work painlessly. Switched to Mullvad and now I can forget to even have a VPN. And also the Android mail app could be better indeed.

All in all it seems to me that Proton makes sense if you can have the entire package: but once you have problems with one or more of their services (VPN, email) and need to look elsewhere, then you can find good alternatives at cheaper prices.