If ever there was a case study in the complexity of "market forces", it's Microsoft's Windows' resilience to pressure from clearly superior options like MacOS. As a life long Linux user, I'd like to believe it's the year of desktop Linux, and Linux is a clear threat, but...maybe next year.

Naively one would think that the single greatest market force on Windows would be its users making informed decisions and migrating to better OS options. But continually they don't. So it's clear that Windows' own merits are not what shapes those market forces, but a complex ecosystem of gaming, IT departments, and a long tail of other things difficult to enumerate.