Yeah I've got enough yubikeys that I'm very unlikely to lose them all. The only thing that I'm vulnerable to right now is a house-burns-down kind of situation,

Yeah I've got enough yubikeys that I'm very unlikely to lose them all. The only thing that I'm vulnerable to right now is a house-burns-down kind of situation, and I'm considering storing a yubikey at someone else's house to get offsite backup.