The issue I'm talking about is gaming performance. Apple sells Mac Pros starting at $3000. These machines use workstation class Xeon processors with ECC memory and workstation class graphics cards designed for double precision floating point computation. These features are irrelevant to gamers. It is not hard at all to build a cheap machine that can beat one of these workstations in all your favourite games, especially when you consider the abysmal state of OpenGL drivers on macOS.