I'd assume that a protocol that gets faster for files the more nodes who use it and the faster those nodes transmit would try to solve real world issues stoppin

I'd assume that a protocol that gets faster for files the more nodes who use it and the faster those nodes transmit would try to solve real world issues stopping more nodes/faster speeds from those nodes. The word 'responsibility' that you used is of course too strong a word, however the comment 'it would be nice' to have is definitely true assuming we want downloads to be faster.