I don't know if it's still the issue, but even the yubikey has its limits. It's a max of (from memory) 32 2fa codes.
Which seems a lot but isn't really
This is a good description of the Yubikey advantage. However, now that Authenticator apps are making it easier (and less secure) for you to move your secrets to new devices, this only underscores your need to register at least two Yubikeys in each place where you use TOTP, and don't forget those paper backup codes as well.<p>TOTP (and other) secrets will never come out of a Yubikey once they've been sent into it. And I like it that way.
Moving from Google authenticator to another application is extremely simple.<p>I don't know why the author has so much trouble transferring 2FA. You take a picture of a QR code and it's all done for you. (This is also a good way to backup your tokens on a different device)<p>With that being said I love my yubikey and want to try this app.