I would be happy if more people adopted password managers. We'd all be a lot better off if they did. And personally I don't care which tool they use to get there. But there's still too much friction in using a password manager, not all of which is the fault of the password manager (eg different password requirements, how 2FA verification is handled, the antiquated notion of password expiry, some sites split username and password onto two pages so you have to verify twice, some sites using a third field you have to fill in like surname).

So I'm not sure how many people will actually use this just because of this friction.

Branding a solution as Apple isn't a guarantee of success. If it were, we'd still have Safari for Windows.