I have to admit, I've never looked into this at all. My Wii, Xbox 360, and PS3 libraries are all considerably smaller than my PS2 or PS4 libraries, but that has a lot more to do with the tyoe of games I enjoy as opposed to size of the library. I love games, but I can't think of a console that has 1000 or more games that I want to play. Maybe a few hundred. As Aussie said, the limited print companies shipping physicals of indie games definitely ballooned the amount of releases, and for me, who prefers retro games and metroidvanias, the PS4 had been a goldmine of stuff I enjoy compared to the PS3, that has a few really nice games for me, but I don't think there are even 50 physicals on the console I'd have a ton of fun with (given my own tastes).