Why would you want a cable when you can have a great feeling hydraulic button
Because cables are simpler, easier to work with, easier to get spares for or bypass. Hydraulic is nice when it’s working but I broke the lever on my KS in a crash in the alps, I just removed the cable entirely and operated it manually at the post end but if I’d wanted to fix it, I could have got every part required from any bike shop in the world for a couple of quid. Good luck with either of those with a reverb.
I saw a chap at glencoe who knocked the hose off his Reverb on the chairlift, then discovered he couldn’t drop the seatpost at all. That’s not really ideal there.