BTW I'm not judging you. I'm just saying I don't know why you would expect that that is not indeed your top earning potential given your skillset.
This.
In your post you mentioned nothing but salary. Sadly I think you might find the hard way that the whole FAANG salary rat-race isn't/wasn't the best choice
Wasn't the question about using them for auth, not application state?
Whether a user is auth'd or not can indeed be a form of application state