Not sure what you mean by devastating, but supply chain attacks occur pretty much daily worldwide and LLMs have been used by attackers since multiple years at that point. Defending against supply chain threats is a pretty hard area to iterate and things are slow to change. For example pypi only supports trusted publishers since 2023 IIRC, and lots of large companies are still not consistently using that option
Not sure what you mean by devastating, but supply chain attacks occur pretty much daily worldwide and LLMs have been used by attackers since multiple years at that point. Defending against supply chain threats is a pretty hard area to iterate and things are slow to change. For example pypi only supports trusted publishers since 2023 IIRC, and lots of large companies are still not consistently using that option