YES, but many people used to use a cd-rom as their primary and the DVD only for movies, ripping, etc because DVD drives were more expensive. Less use means longer life.
Since DVD drives are cheap now it shouldn't matter IMO. I only use a DVD and CDRW in my sytem. Seems goofy to add a cd-rom when both read cd-rom's.
edit: ooops I meant No it is not a problem.