To be fair, there are many people nowadays that would argue that Microsoft is at or reaching monopoly-levels of dominance. Linux might as well not exist outside

To be fair, there are many people nowadays that would argue that Microsoft is at or reaching monopoly-levels of dominance. Linux might as well not exist outside of software fields and developers. We see them exert that control every now and then too (such as their rampant ads and attempts to control browsers). Google, Facebook, Microsoft and Apple all tend to control different but large spheres of the internet. In those spheres they exert almost ironclad control over everything and we see them slowly creep more and more into our personal lives or gathering our personal data. I'm not sure how to say competition really worked in this case because we've seen new fields pop up followed by complete dominance by one company over that field.