Fediverse

Not OP, but in progress as well

Email is pretty easy.

Google docs is less easy if you need to collaborate with people professionally, but you can always go back to PDF, email, and openoffice to a point

Android phone is hard, I could go to Apple, but I don't really like them any more than Google. I have drones and cameras that only want to talk through Android/iOS. Losing my Android app purchases is a bit bitter.

Pay-to-tap is hard. I can move to Garmin eventually, but they're really expensive, and there's only like one model that's good for it. I can always just use my credit card to tap through.

Non-Apple/Android Bluetooth watches are underwhelming or expensive AF (Garmin, for example, still requires Apple or Android for the initial setup and is expensive).

OAUTH is a major sticking point. I log in to a LOT of stuff with my Google ID.

I also have a legacy Google Workspace; they host my domain email, my domain OAuth, and my family calendar is all over there. They're all sharing through it.

There's no good replacement for Waze. No crowd-sourced traffic is good at routing you from state to state around large metro areas. There are loads of maps. but nothing dependable for anything other than a short ish trip.