Ah, disc swapping...those were the days.
It was funny that some games implement disc swapping as a gimmick to make the game look bigger than it was, and just bloated the disc with out-of-engine cutscenes (the Lunar re-releases did this. No complaints though, they're awesome)
I think I realized when CDs were a dead medium for gaming when I had one game's installation, EverQuest 2, take up TEN CDs. And that was for the vanilla version!