In the near to medium term, the current open source regime has issues because bugs have become extremely discoverable and easy to exploit. But I am skeptical that obscurity will provide vibe coded deps sufficient protection over the long term. As soon as the source code for those vibe-coded deps leaks, you are screwed.
The value of 'code written before 2024' is going to be substantially higher than of code written afterwards.
Sort of like a 'low background steel', a comparison someone made on HN before which I think was pretty good.
Pre-2024 code is full of human-written vulnerabilities.