im happy to say ive never downloaded anything for any of the three consoles, and i refuse to 'update' my games with DLC, partly because my internet sucks, but also, if they (developers, etc) thought a game would sell why not make a disc?, loads of shit games came out for ps1, xbox, etc
as for DLC why not just include this extra content on the disc?, its not as if they just turn on their computers and this extra stuff has appeared overnight!