Since I use a Mac, I will refer to my MacOS experience: Keychain and now Passwords will sync passkeys via iCloud to any other device. The end result is that you only have one passkey. Pretty seamless experience.
Can I still have a seamless experience with passkeys, or have they made that difficult? Do I need to remember to reject the dialog offering to save keys on Keychain and learn to use a 3rd party passkey service?
What am I supposed to about all the passkeys that will be needed at my multiple jobs, which I access from my own Macbook and phone? Can I use a single service, ideally open source, or do I need to use several "passkey sharing & backup managers", one for each entity and one more for my personal keys?
Trust issues aside, is there a way to get those passkeys out of there?
Suppose you want to switch from iCloud to whatever else, can you export and import those passkeys?
Other tools do, though, like KeepassXC or any other password manager really.
Any other Apple™ device.