Experience wise i’ve had a better time with mullvad at every corner when it comes to vpns than proton.
Protons still a respectable company i’d say but there focus is gonna become spread more thin while mullvads gonna continue providing a stable and simple experience.
Plus mullvads never gonna confuse you when it comes to pricing unlike proton, no extra time spent finding the difference between a monthly and annual subscription.
Apple is releasing a more comprehensive password manager in the next few months, if she’s heavily in the apple ecosystem the switch could be pretty convenient
Obviously bitwarden or keepass would be great but this would be a bump up from being stored in a browser