I've been talking about it for like a year without pulling the trigger, but I'm also in the "besides, it's Google" camp and will jump to Proton mail, which is a secure mail service. They have a calendar app now, so it will be easier to make the switch from the googles. I'm looking at keeping the google account for now as a throwaway and to use with the phone, but moving my main mail to Proton.
I don't know if any such thing exists, but it would be nice to have an Open Office equivalent of the google suite (mail, calendar, maps, duo, drive, etc.).