[lazylester]

What problems do you see with yubikey? I just finished deploying an app with FIDO 2FA using yubikey and it went pretty well. Had to restrict users to Chrome, though, but in my scenario this wasn't a problem. My biggest problem was adapting my (rspec/capybara) integration test suite. Do you know of issues that I may not yet have seen?

[cp9]

well I mean for broad adoption, in particular. For example, you hit on one of them. Users want to use all different browsers, restricting people to Chrome isn't viable for plenty of reasons. I think the biggest problem is that I have an iPhone sitting next to me and no way to use a yubikey with it. Many (most?) Android phones are the same way.