Good point. I think A2 can be distinguished from A1 if the writer is willing to put in a little work. Some of the best lessons I learned were from people saying, "Oh, yeah, I made a mistake like that once. Here's how I think about it now. And let me tell you the story of an even bigger mistake I made."

But that sort of compassionate oral tradition only takes us so far. The number of people who will ever approach the level of a professional engineer is small. I think if we want to squeeze the full value out of digital technology, it's going to have to be approachable to the non-expert. Being compassionate in discussion can help there, but I think it's even more important to be compassionate in construction.