Its not one more Gadget that you have to carry around. New Lenovo Laptops and Samsung Phones already have UAF enabled Fingerprint Sensors that could be used for

Its not one more Gadget that you have to carry around. New Lenovo Laptops and Samsung Phones already have UAF enabled Fingerprint Sensors that could be used for all your Web Authentification needs. The Yubikey is either the size of a USB slot or the size of a key on your keychain, so even your second factor is pretty minimal in size. Alternative Login is always a problem, their is always a tradeoff between security and useability. You could easly print out some backup access codes. You can continue to use your E-Mail as a anker, you get an E-Mail and then your allowed to register a new token. That leaves the question of how does your E-Mail provider secure its login? I think Google is a good example of the options that are possible.