Your points are all excellent examples of how far Passkeys have to go before they’re useful and usable for the masses.

They are cross-platform, but I’ve noticed that the platform makers want so strongly to keep you within their various gardens, that using them across ecosystems isn’t very intuitive or obvious unless you experiment or already know. That’s not a great way to foster mass adoption.

I’m using them everywhere I can and that make sense, but I’m tracking their use very closely in my password manager.