Comment by lanstin

New software demands a new vocabulary, and if those new concepts correspond exactly to implemented code, everything becomes very clear and possible to share with new people.

As well, the division of a project into layers where each layer has a manageable amount of concepts, 5-7 for normal layers, becomes much easier for people to learn and use correctly. If I have to keep 12 things in mind while using a layer, it's going to be a lot harder to get correct.