@edsu @adamgreenfield (3) work that is highly parallel; i.e., if new person off the street does does something slowly or badly, it doesn’t slow/stop work for others.
Wikipedia does this very well, which is part of its success despite otherwise not being very invitational.
Traditional software development used to be *actively terrible* at this, which was a competitive advantage for open software for a long time. But for many mid-size software projects it is hard.