I think it's on a par with clean, well commented code: people with the right experience and know-how can do it as they go without any extra effort; others will

I think it's on a par with clean, well commented code: people with the right experience and know-how can do it as they go without any extra effort; others will need to go back and rework it to get to the same point - and that's time that they probably won't get. I guess I'm trying to be optimistic and say that it can be done, but it requires a certain amount of discipline.