it's all about routine and change, sounds strange, but true. The routine comes in the form of house and techno all being sequenced and produced to a certain degree i.e the 4/4 kick to keep things inline, a hi hat on every 3rd beat etc etc. This brings the routine and familiarity that everyone inside, even sub-conciously, needs to process something correctly. The change comes with the persons own individual "journey" as it were in what they are into, what they are getting into, what they've been into for the past however many years etc etc. Everyone needs a change at some point, otherwise its overkill time. A good example are people like Beyer going down the minimal route, or we'l say "less banging" to save any arguements. They get slated, and i mean seriously slated by some people, for doing something that someone doesnt like. What people forget is that after doing and being known for nigh on ten years for doing that basically one hard, loopy sound, it's going to get mind numbingly boring to the producer and it's by nature that they delve into other areas. But they have an audience that they dont want to totally alienate. Hence the routine section, something familiar whilst changing the overall product

like that example above from Tony, which personally i happen to enjoy the 2nd sample more. Notice it sounds alot better produced than the Pump Panel track too, which is a classic definately, but im guessing the 2nd release came a while after which just shows the natural progression, the natural maturation of the producer and need to change....

so basically, its just natural