There is a subtlety here that I feel like is being missed. Yes, via remote attestation, websites can require only passkeys from Google and Apple are usable. But you can still use those passkeys with Linux. It is a restriction on how you can authenticate and I can understand concerns over the lack of freedom in this area, but it is pretty far from a threat that would prevent the use of Linux.
There is a subtlety here that I feel like is being missed. Yes, via remote attestation, websites can require only passkeys from Google and Apple are usable. But you can still use those passkeys with Linux. It is a restriction on how you can authenticate and I can understand concerns over the lack of freedom in this area, but it is pretty far from a threat that would prevent the use of Linux.