Comment by array_key_first

Being widely used means almost nothing. There's a lot of reasons things can be widely used. Inertia, history, coercion, cheating, lying, addiction.

Windows is the most widely used because of history and inertia. It is not the best option in just about any metric, and a lot of this is objective. It's slow, the software is poorly designed and obtuse to use, and it lacks functionality. However, people already kind of know it, so it remains.

If Microsoft didn't get the IBM gig early on, we would not be using Windows.