AI’s Best ROI Right Now Is Fixing Old Code, Not Writing New Code

The flashy AI demo — type a prompt, get an app — is not where the real enterprise AI action is. The harder, more valuable work is happening inside aging legacy codebases that no one wants to touch, full of undocumented business logic written by engineers long gone. That's where AI is quietly making its biggest impact, and it's far less glamorous than the demos suggest.