I find it really hard to leave. I finally left Gmail, but I have many pictures in Photos (I have been postponing a migration to Immich for years), regularly use Maps and have a few documents left to copy in Paperless from Drive. Oh yeah, and almost every video creator I follow have yet to use Peertube instead of YouTube.
I have yet to switch to GrapheneOS, I think I'll do that when I buy a new phone once mine cease to receive updates in October.