Not sure what they're called but a lot of older consoles had disc drives that would require you to just press a button which would open the disc drive manually. As an example, a PS1.
Now the 3 consoles have discs drives that whirl the drive the tray out (Xbox 360) or let you push them in making them go in automatically (PS3 and Wii). It's nice and all but what happens if you break it? It's buggered and off to repair for a couple of weeks.
In fact, bring back a cartridge type media where all you did was push it in the slot. Without blowing in the cartridge for an hour of course. Are we that lazy to not open a disc tray?