Having worked in the music profession now for nearly half my life (and I'm only 30 before any wisecracks) I see this from both sides.....I started off as a DJ and I can understand that when people are out for a night partying and dancing then you do need a solid drum and/or bass line to give you something to dance to...but does this mean that dance songs should be obscure and only for dancing to....obviously not....so DJ's started to pick up originally on snippets of songs that people knew well and would loop them to give recognisable tunes that people knew but could dance to.....this has followed onto the extent now where the vocal track is lifted and just dropped on a drum and bass sample with a keyboard melody......A big part of me that once loved this cause it made my job so easy pleasing the punters now hates it all....My perspective has changed and I am now a gigging traditional musician and I hate to see people who have taken years learning to play being usurped by a machine and faceless, soulless technology......It comes down to horses for courses I suppose, both types have their place and time, but I think that even if you examine the last 15 years or so of music you'll see that the dance music (with a few noticeable exceptions) has faded quite badly while the "real" music has remained with us. History will let us know if this will last or not........As an interesting aside I have noticed a few musicians have started to do acoustic versions of dance songs....sweet revenge!