Great article!

> There exists a higher level problem of holistic system behavior verification

This is the key observation. Strict, code-level verification of every line, while valuable in the small, doesn't contribute very meaningfully to understanding or building confidence in higher level system properties.

I see a future of modules with well defined interfaces and associated contracts. Module level contracts can be formally verified or confidently believed via property based testing. Higher level system behavior can then be proven or tested by assuming the module contracts are upheld.

Module boundaries allow for varying the desired level of confidence module by module (testing, property based testing with variable run time allotments, formal verification).

LLMs can handle each step of that chain today, allowing humans to invest specifically where we want more confidence.