You have a credit score if you want to get a mortgage—soon you’ll have a social-credit score that people can check to see if you fit the bill for their service/community/etc.
Potential landlords, employers, car-share companies and dates will scan your social-credit score to see if you fit the bill. We’re facing a world in which you’ll be a social outcast if you don’t regularly grant access to your Facebook profile. Facebook is becoming our de facto social-credit system.
I deleted my Facebook account 7 or 8 years ago, and many times since then I've downloaded an app that seems useful and interesting, only to immediately delete it when it demands that I sign in with Facebook and nothing else. At what point will I be locked out of things I actually need because I'm not on Facebook?