Does anyone remember 15 years ago when the dot-com boom was just starting? A lot of companies were running on Sun. Sun was the best hardware you could buy for the price. It was reliable and a lot of engineers had experience with the operating system, SunOS a flavor of Unix.
Yet suddenly companies were switching to cheap crappy hardware. The stuff failed more often, had lower quality control, and cheaper and slower buses. Despite all of that, cutting edge firms and startups were moving to commodity hardware in droves. Why was it so?