Even if the original developers weren’t rock stars, the codebase was feature-complete in the 80s or earlier and they’ve spent the decades since then eliminating nearly every single bug.
The real issue is that it’s expensive to add new features compared to a modern codebase , and it’s very difficult to find COBOL programmers in 2025.
Eventually a bank is going to take the gamble and rewrite everything in a modern language, and designed with modern tech in mind. But, it’s going to be a huge gamble. And, I can guarantee you, they’re not going to be vibe-coding it.
Even if the original developers weren’t rock stars, the codebase was feature-complete in the 80s or earlier and they’ve spent the decades since then eliminating nearly every single bug.
The real issue is that it’s expensive to add new features compared to a modern codebase , and it’s very difficult to find COBOL programmers in 2025.
Eventually a bank is going to take the gamble and rewrite everything in a modern language, and designed with modern tech in mind. But, it’s going to be a huge gamble. And, I can guarantee you, they’re not going to be vibe-coding it.