you click "sign in" and you are signed in. that's the dream. my non-technical family and friends have been lamenting not being able to do that for years. my customers are asking for it.
My extended family fought me about migrating to Signal for years. I stopped trying. One or two years later, they were all on it, acting as if they hadn't given me grief for it.
They have learned their lesson, though. A couple of them have come to me asking about passkeys, and I tell them the threat of losing access and let them make their decision. I think both of them chose to keep passwords.
The more techno-masochistic ones tried again immediately out of curiosity (hence "at least"), but the rest have sworn off passkeys permanently.
And I don't blame them. Without cross-platform sync being standard and literally everywhere, it's trusting hardware and OS vendors to do a good job and inter-operate correctly for the long-term future. They've all used computers for long enough to know that's not something you can trust them with, particularly not in low-margin devices like most people use.
if they can have that level of reliability with a bit more everyday convenience, they'll be happy.