Unless people use weak passwords today, all their passwords are scattered across various browsers and system autofill, unless they use a PW manager deliberately, in which case they’re “locked in”.
One of the couterpoints here is that while good security might have you adopt one password manager vendor, that vendor is not necessarily the same as your platform vendor. Traditionally this is a way to fight vendor lock in.
There are open source password managers with decent interop. The interop is very crusty csv export / import, but hey, it’s not Hotel California.
With passkeys, the concern is that the platform vendor will become the password manager for a lot of people … Android users will use Google’s built in password mgmt tools, iOS users will use Apple’s. This makes switching that much more difficult.
One of the couterpoints here is that while good security might have you adopt one password manager vendor, that vendor is not necessarily the same as your platform vendor. Traditionally this is a way to fight vendor lock in.