I'm talking about maintenance, obviously you must make sure the code does the correct thing initially. I have maintained a 100k LOC Rails app for 7 years with

I'm talking about maintenance, obviously you must make sure the code does the correct thing initially. I have maintained a 100k LOC Rails app for 7 years with near 100% test coverage. And guess what? Stuff breaks. 99% of the stupid breakages I have experienced would have been impossible in Haskell. What's the longest you've maintained something?