Well I for one think Electronic Music has too many sub-genres. Like if you change the timing of the highhat or the type of synth you're using it catapults you into a different genre. Whats that all about? Why does it need to be so segmented?
Djs don’t buy all one sub genre, generally, but they do tend to focus on a few of them and that’s why the labels and record stores try and cater to what djs are looking for.