alt Hacker News>How do I use it on my desktop or laptop then
>What if I switch browsers on my phone
>What if I get a new phone
You can let Apple sync your passkeys between devices using iCloud Keychain. Then you can create a passkey on one device and have it available on all of your devices. Google also syncs passkeys to the cloud and lets you use them on Windows (with Chrome)
>What if I change from android to iOS or visa versa
I resolve this by storing most of my passkeys in my password manager. I still store the "important" ones (like online banking) in my phone so a password manager breach doesn't make me lose my money.
>What if I need to log into the site on my Wii U's browser?
Passkeys were designed to let you have more than one, so if you have a device that doesn't let you use your password manager, then just set up another passkey.
Nothing wrong with your answer itself, but having to be Apple or Google is a PITA. These account are ultra critical already and you will want maximum security to access them.
This means if you go on a trip somewhere you absolutely need two devices. If you kill your phone and want to buy another one ASAP, you wont be able to do anything with the new device until you can convince the platform it's you. With passkeys you're just SOL. Imagining if you needed a phone to get back from your trip - e.g. etickets, auth needed etc. - it becomes a nightmare scenario.
A third party manager makes it easier, but it's a lot less usable that the first party ones.
Reasonable people make different life choice, having to constantly think about backup strategies whenever I'm away from home would be so stress inducing to me.