Well what's arguably even more horrifying is according to "Estimated average energy efficiency of bitcoin mining hardware" no significant changed happened since 2014. I imagine we went from CPU to GPU to ASIC in couple of years and now for more than a decade, no change, just more.
I'm not sure what data you looking at but we went from 8300 J/TH in 2014 to 33.4 J/TH in 2023. So... what are you talking about?
Well, improved energy efficiency just means more hashes/s and the difficulty adjusting. There's nothing to be gained in terms of the security or efficiency of the network as a whole by making the hardware faster, it's only good for whoever makes and uses that hardware.