Yeah, still working out the details for email-only login.

The biggest pain is that opening a link from email usually creates a new tab, so you end up having two windows open. The new window should show you as logged-in, but the previous window doesn't auto-update yet (it should soon).

The other tricky part (and annoyance) is wait for mail and making sure it opens in your preferred browser.

The big upside is that we don't need to hold on to anyone's password, and assuming you use some form of webmail, it has the possibility to be pretty seamless. Just have to get to that point :)