As someone who has spent quite a bit of time documenting the internal workings (i.e. design) of various software and systems and much less so user interfaces (a

As someone who has spent quite a bit of time documenting the internal workings (i.e. design) of various software and systems and much less so user interfaces (ain't nobody got time for that), it is interesting to note that the opposite is what is available in open source projects. I mean, it makes sense since the internals are probably moving more than the interfaces and since everybody reads code anyway they can just do that. On the other hand, design documentation allows one to quickly figure out how a particular feature works, which is more tedious to do from just reading code. Barrier for use is lower, but barrier for contributing is higher, or something...