I've yet to figure out how passkeys can be useful for someone who switches between multiple devices (and platforms) throughout the day, and who wants to retain

I've yet to figure out how passkeys can be useful for someone who switches between multiple devices (and platforms) throughout the day, and who wants to retain control over where tokens are stored. I have switched as many of my MFA credentials as possible to TOTP and have avoided Yubikeys because I don't want to be tied to a single piece of hardware that can be easily lost, or to an identity provided that may decide to lock me out...