This is fair. But at that point the same could be said of a Chromebook for her needs, which I’d venture is true for most people’s computing needs given entire swaths of the world do everything on a phone or tablet.

The Linux vs Windows debate is peculiar, because it really only applies to users who are more advanced than the average, arguing about problems that only arise when you want to do more demanding things with your machine like development and gaming. Your average user doesn’t care about any of the anti-monopolistic / FOSS reasons to use Linux, which makes the argument for them essentially “you should use this operating system that takes more work to use because it’s better for you for reasons you don’t care about.”

In order for Linux to become more mainstream, it needs to be able to exceed Windows’ performance and ease of use for gaming and productivity - which is challenging since when most users think of productivity apps, they only think of Microsoft products. It’s not enough to be equal in order to compel people to switch from what they’re accustomed to.