What trend? CNC backings? Who started it actually? Plazmatic? Heatsink? and did someone come between? As a user/manufacturer of CNC backings, I can only say that with a well set-up brake, you won't be feeling much of a difference, plastic/CNC backings. I'm sure that KOXX/MONTY/Echo etc. would have made these CNC backing if they could just see a big market for it. Showed my first pair to Ot Pi in Czech Rep. in 2003. He was very impressed but within 3 min. he talked about forged backing instead of CNC. Also Vincent Hermance, Coustellier brothers and Ben Savage have tried my CNC backings. Mr. Savage still uses them. You should get a pair of CNC backings if you want stiff brakes and like to have some nice quality on your bike. Not to get a stronger brake... If it was just that simple.