> I've always wanted sort of the opposite. I'd sign up to a website, and they wouldn't ask for a password. To login, they would email a link to click and I'd be logged in for however long that cookie lasted. Why don't sites do that?

> (Is email still considered slow? I remember having wait times in the hours back in the 90s, but I'm not sure I've ever waited anywhere near a minute in the past decade.)

Tumblr does this at the moment. It asks for either email click or a traditional username/password setup.