I tried. The power-grabbing garbage was immediately apparent and sent me straight for "heck no, I'll just use passwords until they figure this out, at least that can't control my password manager".
In principle I should be very in favor of them, but the wild variety of lack of support for basics, and the built-in-the-spec ability for site X to control how I store and sync stuff is utterly bonkers. It's feeling like the OpenID promise -> OAuth platform lock-in cycle all over again, but compressed into v1.
