The current trend of "games as a service" has horribly corrupted the way people enjoy video games. It's okay to stop playing a game and say you're done with it, even a game as vast as Minecraft. I don't think it's necessary to feel like a game should get updates with more content and such. It's okay to wish a game had more stuff to do in it and in some ways, mods can definitely fix that problem. Eventually, though, you'll run back into the same issue where you might feel like you've done everything, or you've done so much that it just isn't interesting to you anymore. That's okay. It just means it's time to move on and find a new game to play that you enjoy, and maybe come back every once and a while when you feel like it. There are so many games out there to explore, both new and old ones. It might feel a little sad to not enjoy something as much as you used to, for whatever reason, but it's natural.
There are quite a few games that I had an extremely great time playing but just won't ever go back to them because I feel like I've done everything, I've accomplished all the goals I wanted to. Two that really stand out are Ratchet and Clank and inFAMOUS Second Son. There's just nothing left for me in those games, even though I really loved playing them. Every now and then I'll get the urge to play again, but realize that I'll spend a bunch of time installing the game and setting it up only to play for a couple hours and realize it just isn't going to be the same experience, or even an enjoyable one. That's okay. There's many games to be played. Hell, my Steam library is begging me to play my backlog of, what, 200 games or something?
Good take.