This is an interesting thread. I got into computer gaming in the late 90s with the Command and Conquer series. Back then, I had a very underpowered computer but it ran those games fine. Then as I started to get more powerful computers, the fun of playing games dropped a bit, compared to the earlier times. Maybe it is because we are comparing our experiences rather than playing the actual game, I'm not sure. I just believe that what those old games had is not there today. I have yet to find an RTS game that matched the level of fun the Command and Conquer games had. The new C&C are not it, based on reviews.
I have a mid-level computer today that is about 2 years old, so I don't really need to upgrade at all. In fact, since all I play are old games, such as Return to Castle Wolfenstein and Rise of Nations, I don't even have a graphics card in my system. The integrated graphics runs them just fine.
I think when I stopped my subscription to the PC Gamer magazine is about the time I stopped caring for the newest games - that must have been about 4 years ago or so. Sometimes I have the desire to renew my subscription to PC Gamer but that would mean I would have to get a graphics card and buy those new games, LOL. I've been out of the gaming arena for so long that I don't know any of the modern games. Also, it is a time thing as well. As we do other things, the time we have available to game is reduced. Plus what used to entertain us isn't as entertaining anymore. All of these factors play a role in why we quit some activities.