Well, nothing new has been invented since checkers, if you really think about it hard enough and reduce everything to a few buckets of games that everything can fit neatly into, then everything is just a mystery game or just open world or just a platformer. Again, I have a feeling like you're just looking at it mechanically and not how these elements work together to produce a game that is larger than just the sum of its parts. Outer Wilds has puzzles and open world and mystery element to it - and all of those have been done before. But has anyone else combined them this way to produce a game with this narrative? No, I don't believe so(happy to be proven wrong, as always).

Like the other commenter said - I hope I don't become jaded like this about video games, it still brings me joy to see how every new game twists the known formula a little bit more and in new and exciting ways, I believe there are several nieches where we haven't seen the game of that genre yet and I can't wait to see it emerge and how and who is going to do it.

Into the Breach only came out 8 years ago, but I'm still playing it vigorously.

I'm sorry to say, your nostalgia-colored-glasses are so strong, you're actually blinded by them. I grew up in the same gaming era as you (started around early to mid 90s, but the peak was later), and I too have fond memories. But there undeniably has been some magnificent progress in pretty much all aspects of gaming.

Somewhere between 2005 and 2010, I thought I had outgrown gaming, and that no game would have anything to offer to me right now. But years later I learned that that was just because I was stuck thinking that JRPGs were the pinnacle of gaming, it turned out that I had grown out of those. Obviously your story will be different, but I bet there is some story to you somewhere.

I've been playing games since I could hold a controller basically, so 26-ish years, and I think modern gaming is phenomenal. I feel sad for you, but it is what it is. Just your loss in the end.