Can you name a game that is older than NetHack and still in active development? I can't.
https://en.wikipedia.org/wiki/Moria_(1983_video_game)
> Stable release 5.7.15 / 4 June 2021; 4 years ago
Not to say that this is necessarily the right way to look at it. It's not clear-cut, is what I'm saying.