I see what you are saying and I'd love for many of the "greats" to get some more exposure in the modern marketplace (covers are a good way to do that) and among the younger generations. (It's good for those kids to know what real music sounds like. ) But I'm torn on this issue because I frequently find clueless kids who don't realize that the "great new song" performed by their new metal (or nu-metal) heroes is actually a cover.