First image is CC3.0 https://www.produnis.de/blog/posts/altabergut/2010-02-16-kinderleicht.html
For general use, Linux is fantastic. But as other people have said, some software only works on other systems. Also, some software does run on Linux, but not acceptably so (for example, SteamVR).
But as other people have said, some software only works on other systems.
For most of the general tasks that people have traditionally used computers for, it seems that most people nowadays generally just use their phone. Usually when anyone decides to use an actual computer for something, it’s because they have a task that requires them to use some specific piece of software, and that software is unfortunately often only available on Windows/macOS.