There are lots of decks with soft touch/feather touch controls. Some you just feel that switch, no soft touch even needed. AKAI GXC 570D, 535D etc.
This is when solenoids, levers, cams, motors and more moving parts come to the picture and make it very complex.
I have many decks with soft touch controls in my collection, even high end Nakamichi and all.
Once it fails, to repair those are never easy.
Over the years they might have developed more efficient mechanisms and I'm not doubting it.
All from my own experience!