Yes and no. There is the infamous quote of Microsoft, about 30%(?) of their code being written by AI now. And technically, it's probably not that such a wild claim in certain areas. AI is very good at barfing up common popular patterns, and companies have a huge amount of patternized software, like UIs, tests, documentation or marketing-fluff. So it's quite easy to "outsource" such grunt-work if AI has the necessary level.

But to say that they don't write any code at all, it's really stretched. Maybe I'm not good enough at AI-assisted and vibe coding, but code-quality always seems to drop down really hard the moment one steps a bit outside the common patterns.

I found LLLMs to be very good of writing (unit) tests for my code, for example. They just don't get tired iterating over all corner cases. Those tests easily, in LoC, dwarf the actual implementation. Not sure if that would count towards the 30%, for example.