"The most amazing achievement of the computer software industry is the continuing cancellation of the steady and staggering gains made by the computer hardware industry" -Henry Petroski

Efficiency is very important to me. (And in the era of climate change, it should be important to everyone.) I consider web apps to be about the least efficient form of software yet discovered. We suddenly need two relatively beefy computers with multi-GHz multi-core processors and GB of RAM, one of which must be powered on 24/7, to do something that could have been done on the hardware of the mid-80s.