This is a pretty myopic stance that says everything is fine. It’s not. PR histories can be gigantic, interwoven, doesn’t tell you how and only sometimes tells you the why—-usually at a very fine grain of detail. Saying that you can “document it right” is like saying “code it well in the first place.” Much of the time there aren’t great comments or PRs, and what there is ends up assuming a huge amount of knowledge about the why/how. If you’re an outsider coming in, we should be able to do way better to help.