I still can use my password. I use the passkeys for the convenience and extra security. If I lost all my devices I would just login with my password and add a new passkey. I would also remove any for devices that I don't control or are damaged. I suspect even if the site were passkey only, they would have some account recovery workflow.

The thing the people are also sometimes missing is that I leave my YubiKey at home... especially in those situatiosn where I am prone to lose it.

Going to a concert - I'll take my phone but not my YubiKey, etc.pp

And if I enroll 2 YubiKeys, I can deposit one safely at home. I want my phone to be less important, not more important.