It seems like we have tons of room to make the internet more efficient even without Moore’s law - how many backends and clients are written in scripting languag

It seems like we have tons of room to make the internet more efficient even without Moore’s law - how many backends and clients are written in scripting languages (PhP, Node, Python, Ruby…) without a whole lot of thought put into energy use (even if they are carefully designed to be fast or “efficient” by some metrics)? And how much of internet energy use is made of serving ads? It seems to be a growing share, and ads increasingly want to stream video, which puts things like PNG decoding & dithering in the margins of overall energy use.