Modern LLMs are _exceptionally_ good at developing X-marks-the-spot vulnerabilities into working software; I fed an old RSA validation mistake in an ECU to someone in a GitHub comment the other day and they had Claude build them a working firmware reflashing tool within a matter of hours.
I think that the market for "using LLMs to triage bug-report inputs by asking it to produce working PoCs" is incredibly under-leveraged so far and if I were more entrepreneurial-minded at this junction I would even consider a company in this space. I'm a little surprised that both this article and most of the discussion under it hasn't gone that direction yet.