Agreed. I guess quite a lot of people were already considering moving but since Google in own domain worked fine and was free it was not enough to spend time moving.
Yeah, very much the case for me. "Well is Fastmail any better?" "Oh Protonmail doesn't support IMAP or custom domains" "Ehh, maybe I'll check something later"
Well now Google have given me an ultimatum. And honestly the same service from Google is worth less than from a competitor because of the risks of being banned from ML and the level of risk from having so much stuff being bundled. So when being a Google product is a negative to the value proposition, yet Google are charging more, time to move.