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/
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.