LOC are not all the same.My heuristics for assessing the difficulty of changes revolve around "load bearing-ness".As software gets more mature / widely used it tends to become harder to change it.It's basically free to change code no one uses. If your metric is LOC you can be very "productive"! But from another perspective you are not being productive yet because no value is delivered. Real changes in software that people use tend to be "load bearing".You can kinda multiply together: what is th...