>I wonder if anyone has implemented a non-optional version of this on any decent scale? i.e. is anyone using passwordless 'email link'-only login? Yes, Craigsl

>I wonder if anyone has implemented a non-optional version of this on any decent scale? i.e. is anyone using passwordless 'email link'-only login? Yes, Craigslist. There's username and passwords now but I believe that's relatively new. The typical workflow doesn't include registering and there wasn't originally an idea of an account (if I recall correctly).