We had originally planned to go all-in on passkeys for ONCE/Campfire, and we built the early authentication system entirely around that. It was not a simple setup! Handling passkeys properly is surprisingly complicated on the backend, but we got it done. Unfortunately, the user experience kinda sucked, so we ended up ripping it all out...
edit: I think I’ve misunderstood the point of the article. In a non-obvious (to me at least) way, he is saying passkeys are dangerous for people without password managers, therefore for most people passwords are still better.