I also had a point where I realized that I knew I wasn’t going to get every game I owned to the table.
I was immediately fine with it. Playing is a hobby, collecting is a hobby, and just plain reading those books is a hobby. I realized I just like reading different RPGs, sometimes to pull stuff for my own campaigns/systems, sometimes for its own sake. So I don’t mind if I buy some books I won’t end up running, so long as I can budget for it. It also helps the people designing and publishing those games.
So I don’t think there’s really anything to answer the question, “What is going on?” We’re just having fun, and that’s enough. :)