"If you asked a junior developer to refactor a rust program to be more idiomatic, how long would you expect that to take? Would you expect the work to compile on the first try?"

The purpose of giving that task to a junior dev isn't to get the task done, it's to teach them -- I will almost always be at least an order order of magnitude faster than a junior for any given task. I don't expect juniors to be similarly productive to me, I expect them to learn.

The parent comment also referred to a 'competent pair programmer', not a junior dev.

My point was that for the tasks that I wanted to use the LLM, frequently there was no amount of specificity that could help the model solve it -- I tried for a long time, and generally if the task wasn't obvious to me, the model generally could not solve it. I'd end up in a game of trying to do nondeterministic/fuzzy programming in English instead of just writing some code to solve the problem.

Again I agree that there is significant value here, because there is a ton of SWE work that is technically trivial, boring, and just eats up time. It's also super helpful as a natural-language info-lookup interface.