Comment by echoangle

If every developer cared for optimizing efficiency and performance, development would become slower and more expensive though. People don’t write bad-performing code because it’s fun but because it’s easier. If hardware is cheap enough, it can be advantageous to quickly write slow code and get a big server instead of spending days optimizing it to save $100 on servers. When scaling up, the tradeoff has to be reconsidered of course.