I played through System Shock 1 and 2 again recently.
SS1 hasn't aged well at all, but SS2 holds up in most ways barring graphics and UI.
I played the Battlefront beta and I enjoyed it while trying to get back into Battlefront 2 is like pulling teeth. I loved that game back on PS2 when playing with friends, but it has not aged well. That said, this doesn't mean I'm going to get the new Battlefront, for reasons outside the game but inextricably tied to it.
Just finished a playthrough of Deus Ex Human Revolution (Directors Cut). I swear the game didn't look as bad as it does now when I first played it years ago. But once I got past that fact, the core game is still really enjoyable for me, especially the Missing Link part which takes all the good of the original and cranks it up to 10.
I wanted to start up a new game of the original Deus Ex but a part of me is reluctant to do so. I know by the time I get to Hong Kong I'll be really into it again, but fuck... I hate the early parts of that game.
I played Starcraft 1 and Starcraft 2 over the last year. Other then graphics, having different stories and how the campaigns are laid out, the games are pretty pretty identical experiences. I still love the 2D sprites in the original though... I miss that era of RTS.
I finally got around to doing a full playthrough of EYE Divine Cybermancy. While not an old game a lot of people laud it for having an old school feel. If Old school feel to these people are great concepts and ideas sewn into poorly considered game design and fucking awful UI, I'll prefer to not go old school. Who thought horde mode style systems build into a game with RPG elements that restrict player versatility, Hacking that requires you to stop and play a Turn Based battle system that leaves you open to the never ending swarms of enemies, of which know exactly where you are at all times, and no matter how you change the "AI settings" in the options have impeccable aim and extremely long line of site, would be a good idea. On top of that the story is a mess even with reworked translations (the fucking original translations are fucking awful and it's not comical).
The game is also designed in such a way that you need to play it at least twice to get the true ending. Fuck off. This is also why Steam Reviews are rubbish. You'd swear this was some sort of diamond in the rough to some of these people. It isn't, it's a polished stone buried under a mountain of septic tank waste disposal.
So what does this have to do with the question being asked?
Well, Good games are good and bad games are bad and some good games become bad with age while others are either unaffected or suffer very little. It doesn't matter what era they are made in, some stuff works and is timeless, others are products of their time and fail to transition. Others are just shit, but it doesn't stop some people loving it dearly.
I can still enjoy old games even if they haven't aged well. The advancements in gaming are a mixed bag. Not all is bad, not all is good. Some games are brilliant others less so. It's mostly a subjective issue.