put it this way...
DVD burners are pretty close to dirt cheap (around 30 bucks, you can get some in the low low 20's on newegg.com OUT THE DOOR) nowadays and it's FAR cheaper burning DVD's then it is CD's especially for general DATA backup etc etc.
cause your typical 'good quality' DVD recordable costs .30 cents where as your typical CD is roughly 20cents... do the math and you will find DVD's are far cheaper to burn for DATA backup.
cause you can fit 6-7CD's per 4.7GB DVD recordable.... and 20cents x 6 = #1.20 vs .30cents or so.
bottom line = CD burning is pretty much obsolete on a PC nowadays unless you burn AUDIO CD's.