A lot of developer documentation is effectively write only. It gets written, often at great cost. But it doesn't get read a lot. It doesn't get a lot of feedback. It's typically out of date. And the lack of documentation is not really blocking anything important anyway.

If you are ever on a project where somebody goes "Somebody should write some documentation for X", you should counter it with "Great idea, get on it!". Mostly nothing will happen. It's rather thankless work. Some people are more proactive on this.

I actually tend to write documentation for myself. Because I'm old and wise enough to realize that if I come back to a project in two years, I will have forgotten most that I would need to get back up to speed quickly.

With agentic coding tools, it's different. The documentation helps. And it gets added to even if you don't ask for it. Which is nice. And you can get a lot of documentation added with a few simple prompts. Which makes it cheap and easy to generate.