I should have been more explicit, but by other platforms, I meant ESEA/Faceit that provide their own anti cheat systems that run independently of VAC. I'm not sure I'm really seeing many people go to ps4/xbox simply because of some cheaters on PC?
Well, most gamers went to consoles over time and there was certainly a thriving cheating scene there, that the console makers (at least Microsoft) were able to push back and destroy. Multi-player is pretty popular everywhere so it's probably a factor, though I'm not enough of a gamer to care. My skillz are so weak it feels like everyone is cheating all the time :)