Also, for some software "everyone uses" like e-mail or an office suite, you can afford maybe some complexity or annoyance. The alternative "do not use e-mail" or "do not use an office suite" is a no go for almost anyone.

The alternative "do not use a password manager" is however totally common. So if you want to get someone with limited time or affordance for annoyance (like your wife) to use a password manager, the process of setting it up and using it better be very smooth and frictionless.

1Password is very good at that part.