When it comes to small focused OSS tools, you can basically code them at the speed of thought with modern LLMs. The slow part is figuring out what you want to do in the first place, the implementing is basically instantaneous. It's literally faster than googling a tool that already does the job.

And yes, that doesn't scale to all problem domains or problem sizes, but in some areas even a 20x speedup would be a huge understatement.