Proposition 1: The majority of a code in a modern app is from shared libraries

Proposition 2: The most popular shared libraries are going to be quickly torn apart by LLM security tools to find vulnerabilities

Proposition 3: After a brief period of mass vulnerability discovery, the overall quality of shared libraries will dramatically increased.

Conclusion: After the initial wave of vulnerabilities has passed, the main threat to open source code bases is in their own comparatively small amount of code.