Time, choice, and subjective value
I guess I used to be a hardcore gamer. But then you get older and life does its thing, and you get interested in other things, and playing games isn’t as central anymore. Also, you’ve played so many games, and you’ve internalized all the various systems they are composed of to an extent that they become these more mechanical experiences, that almost everything you come across seems like a slight variation or evolution of what has come before. At this point, time has become a huge variable in your life, a nonrenewable resource in short supply that is divided among the obligations and the many things you’re passionate about.
With that semi-obvious observation outta the way, I recently tried playing Dark Souls. I don’t think it has passed through my more stringent filter I’ve acquired. I could see a younger me totally becoming hooked on it, though.