I used yubikeys for ssh for years. First via the older clunky gpg as ssh key feature. Then via the FIDO api. My biggest issue was the chicken and egg issue when using this setup on a new machine or god forbid in a container etc. windows and WLS wasn’t super thrilled either. I switched to 1Password ssh because I actually like the fact that I can simply share my keys. It’s still not perfect. Agent forwarding needs an extra configuration and depending how many keys you have and how verbose your ssh config gets it becomes also very finicky. This solution feels for me like a slight setback because it’s a macOS only solution. If you have a Linux or windows machine next to a Mac you have to deal with the insecure key file on your hard drive again either via yubi keys or software solutions.

But I think I would take this over a yubikey. I really disliked the fact that one usb port was constantly in use.