Wondrous revelation

I just realized that Quake 4 doesn't require the DVD to be in the drive to play; I've been swapping out Simpsons and Stargate every time since starting a couple weeks ago. I wish more games would do this. I'm perfectly fine with having to log into a server, like World of Warcraft or Half-Life 2, to not have to deal with having the disc in to play. Optical media is so twentieth-century.