The problem is he has defined maintenance liability as lines code. This isn't true. If your building 3d cad software it's not going to fit in 2000 lines of code

The problem is he has defined maintenance liability as lines code. This isn't true. If your building 3d cad software it's not going to fit in 2000 lines of code no matter how hard you try. An attempt to do so will make it a maintenance nightmare. Having an incorrect model however is a maintenance liability.