After 2 - 3 weeks of trying both @protonmail and @fastmail I have decided to fully switch to Proton going forward.
With Proton you get email, ProtonPass, Proton VPN and other stuff. You also get 500GB of storage instead of the measly little 100GB of storage that Fastmail offers. Notifications on Fastmail were also VERY VERY delayed most of the time, on both Android and iOS.
