4790k might still be reasonable for gaming, but newer games do like to have more than 4 physical cores and what usually happens is that 4790k will have stutters from time to time whereas r5 3600x will not. Also, we're talking about an ideal situation here. If you also have chrome open with many tabs and other stuff running in background, that magical, still alive, still rocking, great in IPC 4790k (this is irony) will show its weaknesses and you will quickly understand why you need a 9700k a 3700x or even more. So yeah, this discussion is good for those people that have 4790k but don't have the money or don't want to spend cash for upgrading, gives them a peace of mind. But the truth is that 4/8 cores CPUs are now at the very limit and cannot do too much with them if you are a real gamer. If you just casually game simpler games, I guess it is fine.