That's not how racing works. You expect all 170 riders to agree with each other to go slow done the descent and wait for each other at the bottom, despite, no doubt, intense pressure from DS's to try to gain a racing advantage? You only need a couple of those 170 riders to try to gain an advantage, and the rest have to follow. Everybody has got quicker, bikes have got quicker, pressure has increased, fron all sides. To expect a peloton to disregard all of that and act purely in each other's interests when fatigue and adrenalin are high is utterly ludicrous. The only reasonable solution is to make bikes safer and slower. Putting the onus on riders to solve this problem is not going to work. Sorry, it isn't, and the meat grinder is going to get worse and we're going to miss out on seeing the best riders because they're in a hospital bed.