Every day. My team owns a 10+ year old system. None of the original authors are around any more. We're doing a massive migration of the system (several of them

Every day. My team owns a 10+ year old system. None of the original authors are around any more. We're doing a massive migration of the system (several of them actually) and being able to go back and understand why the code was written the way it was is great. Earlier this week I needed to understand a very odd piece of code. It was making an rpc and if that threw an exception it was trying the same exception in the exception handler with different parameters. Looking back through the history turns out this was because the code used to do something different but during a migration was changed sick that the second set of parameters made no sense. One I understood that contact the fix was trivial and I felt safe making it