I've worked everywhere from small startups to megacorps. The megacorps certainly do better with things like initial design documents that startups often skip entirely, but even then they're often largely out-of-date because nobody updates them. I can guarantee you that I am talking about common industry practices in consumer-facing apps.

I'm not really interested in what some academic paper has to say -- I use LLM's daily and see first-hand the quality of the documentation and explanations they produce.

I don't think there's any question that, as a general rule, LLM's do a much better job documenting what they're doing, and making it easy for people to read their code, with copious comments explaining what the code is doing and why. Engineers, on the other hand, have lots of competing priorities -- even when they want to document more, the thing needs to be shipped yesterday.

Alright, I'm glad to hear you've had a successful and rich professional career. We definitely agree that engineers generally fail to document when they have competing priorities, and that LLMs can be of use to help offload some of that work successfully.

Your initial comment made it sound like you were commenting on a genuine apples-for-apples comparisons between humans and LLMs, in a controlled setting. That's the place for empiricism, and I think dismissing studies examining such situations is a mistake.

A good warning flag for why that is a mistake is the recent article that showed engineers estimated LLMs sped them up by like 24%, but when measured they were actually slower by 17%. One should always examine whether or not the specifics of the study really applies to them--there is no "end all be all" in empiricism--but when in doubt the scientific method is our primary tool for determining what is actually going on.

But we can just vibe it lol. Fwiw, the parent comment's claims line up more with my experience than yours. Leave an agent running for "hours" (as specified in the comment) coming up with architectural choices, ask it to document all of it, and then come back and see it is a massive mess. I have yet to have a colleague do that, without reaching out and saying "help I'm out of my depth".