I don't. All the services I'm using it on require some sort of backup 2FA method, so I simply use an authenticator app (that I have to use anyway since not all

I don't. All the services I'm using it on require some sort of backup 2FA method, so I simply use an authenticator app (that I have to use anyway since not all websites allow U2F keys) as a backup method. Never managed far in messing around to use Yubikeys for GPG and SSH. It's nice and all, but U2F keys are useful without it as well.