Really? I gave Ubuntu a go as a daily driver a few years back. Getting WiFi working was a struggle, the constant offers to install apps in normal browsing flow was irritating, sound died a few times, and over time my boot partition got filled up with old linux images and had to be cleaned with magical command-line incantations.

That being said, it had less trouble with my network printer than Windows does.

I get the appeal of Linux, but I did not have a grandma-friendly experience.