This is my growing experience of using GrapheneOS.

Mostly everything works just fine. But certain apps don't, because they've made a choice to use Play store integrity. And there are more and more of them, including the UK government ID app. So I can't use my phone to verify my identity because I use a version of Android that's more secure than Google's.

And yeah, I can see it going this way with Linux. If you can't be verified using macOS, Windows, or ChromeOS (or whatever the new thing is) tools, then you become a second class digital citizen.