Sorry to troll, but you've only just noticed? I think this problem started to get bad around year 2000. It was around the time that PC games became more interactive online. Single-player games seem to be extinct now. Gone are the days of retail boxes with serial numbers. No more pausing the mission when your boss comes in. It's all "Game Experience May Change During Online Play" and "electronic software distribution".
Perhaps we're just getting old? Let's burn a few more Sim discs and reflect further.