Windows as a software package would have never been affordable to individuals or local-level orgs in countries like India and Bangladesh (especially in the 2000’s) that are now powerhouses of IT. Same for many SE Asian, Eastern European, African and LatinoAmerican countries as well.
Had the OS been too difficult to pirate, educators and local institutions in these countries would have certainly shifted to Linux and the like. The fact that Windows could be pirated easily is the main factor that led to its ubiquity and allowed it to become a household name. Its rapid popularity in the '00s and early ‘10s cemented its status as the PC operating system. It is probably the same for Microsoft Office as well (it is still a part of many schools’ standard curricula).
The fact that Windows still remains pirateable to this day is perhaps intentional on Microsoft’s part.
PCs are expensive and unpractical.
I wanted a PC, bought a tablet. Ideally, I’d want a SFFPC plus screens that I could easily move. I’d settle for a SFFPC with a dedicated graphics card if I couldn’t move it. I’d also settle for a notebook that would allow me to easily swap HDDs/SSDs. However, none of those things are possible and/or have a good cost-benefit, so I got a tablet.
Notebooks are too clunky compared to tablets because they are attached to a keyboard and to a screen. If those parts were removable, they would be more successful. Tablets would also be more popular if you could use them as PC screens (some from Lenovo already come with this featur).
Manufacturers are moving in the opposite direction, soldering memory, and making as hard as possible to change parts.
13 or so years ago, whenever the first iPads were coming out, that was my first thought. Why don’t they take their laptops, and have the screen removable that it instantly turns into an iPad? Or a windows computer that does the same thing. Microsoft did it with the surface, and it worked pretty well. Still wasn’t quite what I had imagined, but pretty much was. Apple could have made a killing doing something like that, I’m still convinced (if it was PC based when docked though, not their cell phone/iPad OS).