> with readily available devices (e.g. my phone) and yet
I'm pretty sure it wasn't anywhere near ready to use five years ago when I wrote v1 of my webapp. And googling again, it's still not clear whether it would work on whatever random software setup some of my zealous-for-software-freedom colleagues use. With passwords I don't need to worry: if they can render the HTML+CSS (even the JS is optional, because some of my colleagues prefer NoScript), they can log in.
I'm pretty sure it wasn't anywhere near ready to use five years ago when I wrote v1 of my webapp. And googling again, it's still not clear whether it would work on whatever random software setup some of my zealous-for-software-freedom colleagues use. With passwords I don't need to worry: if they can render the HTML+CSS (even the JS is optional, because some of my colleagues prefer NoScript), they can log in.