It sounds like people’s biggest knock against passkeys is that where they are stored is siloed to the Apple or Android ecosystem, so when a user changes platforms, they have a hard time accessing. 

This seems fairly edge case, solvable via a migration tool, and not a good enough reason to lose the ease of passkeys.

summoning /daylight | kylemccollom.com | we are hiring: careers.daylight.xyz

What would you say if the keys would be stored with your Telekom provider, on their network? Asking for a friend 😉

Web3 enthusiast, product expert, bartender // Web3 products @ Deutsche Telekom

No way, even if I used something that isn't an MVNO (Google Fi). There's no way to audit their setup and history - or is it even history yet? - shows that they are not exactly paragons of data protection.