From my notes (which may be wrong):
CD Audio cables are required for the computer to read CD audio in MS-DOS, Windows 95, 98 and NT, but beginning with Windows ME and 2000, the OS reads audio from the drive in digital format by default, so that music and data use the same circuitry, and a separate analog audio cable is no longer required. However, ME and 2000 allow drives to be individually configured to output either analog or digital audio, in case (e.g.) the user wants to listen to CDs using the front headphone jack socket. Modern drives are fully digital and no longer contain any analog circuitry.
"This all reminds me when i took the windows vista sticker thingy off my old laptop, and on my washing machine as a joke. A few days later said washing machine stopped working. I still think this cannot be a coincidence."