> because my corporate code base is a mess that doesn’t lend itself well to AI

What language? I picked up an old JS project that had several developers fail over weeks to upgrade to newer versions of react. But I got it done in a day by using AI to generate a ton of unit tests then loop an upgrade / test / build. Was 9 years out of date and it’s running in prod now with less errors than before.

Also upgraded rails 4 app to rails 8 over a few days.

Done other apps too. None of these are small. Found a few memory leaks in a C++ app that our senior “experts” who have spent 20 years doing c++ couldn’t find.