This is a lesson I think should really be brought up more often. Everyone constantly talks about which language is fast or slow, but 9 times out of 10 the quest

This is a lesson I think should really be brought up more often. Everyone constantly talks about which language is fast or slow, but 9 times out of 10 the question should be which _programs_ are fast or slow. Improvements like this often completely trump everything else. The move from bash to rust is generally a linear improvement, but discovering a better algorithm has way more potential. My experience has been that the range of problems big enough for scale to matter, but small enough for language to matter isn't that big. If I won't wait a year for python to compute something, I probably won't wait three weeks for rust either. Obviously if we're talking about paying for compute cycles then it matters, but surprisingly that's not usually where discussion is focused.