Tangent: To my knowledge Linux DEs not supporting the whole "administrator with root privileges is another user" that Windows has is a large mistake. If I install Mint for someone that just opens a browser once a week and enable automatic updates for them, they shouldn't be allowed privilege escalation rights, but instead a separate "admin" user (me) should have those (with a different user password of course).
If you want to make the year of the Linux desktop happen by letting normies use it, at least make the experience for the people administering those machines simple and not allow users to shoot themselves in the feet. Polkit in DEs is basically useless by not supporting this. It might as well not exist unlike UAC which is great.