Yes, that's what I did but instead of copying the subkey via QR I put it on a Yubikey. Actually it's more convenient that way as it's possible to use it on any

Yes, that's what I did but instead of copying the subkey via QR I put it on a Yubikey. Actually it's more convenient that way as it's possible to use it on any computer. But from my perspective if you keep your master key super secure subkeys can be your "operational keys" that are easily swapped when needed (I rotated my subs when Yubico Infineon bug surfaced).