[pavel_lishin]

> you can similarly use a password manager to save the email address used for a password-less login

Sure, but it still adds an extra step; my current manager doesn't have a "log into the email address you used to register with this site" button.

But you're right, there are advantages to email-based login.

[shanecleveland]

You're right about that extra step, which may be crippling enough to keep users away.