alt Hacker NewsOnly to other proprietary systems within the FIDO Alliance that you don't own or control.
Additionally passkeys allow services to detect and ban specific password managers, so have fun when the only approved managers that works consistently across all services are Google/Apple/Microsoft. There is already a list of "bad" clients here https://passkeys.dev/docs/reference/known-issues/
Again, what are you taking about? There are open source implementations available. I can write my own. They do work. This list just shows some which do not actually implement the spec correctly.
Also moving the goalpost. The post I replied to said I couldn’t export it. I absolutely can, and have, with a single click. To another provider. It’s really not a big deal.