I also have hundreds of accounts. But there are ~10 services that are far more important to me and where I care a lot about security beyond passwords (Fastmail, Dropbox, GitHub, Google Apps, Bank, government websites, etc.). I use most of them already with an U2F key and I’ll use them with Passkey.
The hundreds of other sites will probably take years to support Passkeys (they don’t support U2F either). I can convert them when they support it and I happen to do something else account-wise.
The hundreds of other sites will probably take years to support Passkeys (they don’t support U2F either). I can convert them when they support it and I happen to do something else account-wise.
I don’t think it’s a huge issue.