I personally don't think we need to hew to this rule.
That's fine. It's mostly pedagogical and not worth quibbling about in
general. I personally find this to be a useful rule when writing
documentation and so forth since it leads to reasonably complete
end-to-end flows that novices can understand.
I'm game to change it -- if Paul feels like doing the graphic
editing! But I don't feel it's absolutely essential unless
something thinks we're making it more confusing this way.
I'm okay with the single "swoopy arrow" :-) but did we agree that
steps 1 and 7 should be represented by a solid line? That's my main