You forgot the crazy xml config files that controls everything and never gives you an error if something is wrong - It just does nothing. Maddening to debug.
Too big to make sense of when you can only see a screen's worth at once, so you really need a physical copy. But it's way too big to fit on anything you can get out of a regular office printer and still have it readable. So you really need to go to a print shop and shell out the better part of a C-note to have it done at 36x24 or larger. Ask me how I know.
(Before I paid, I asked our architect client if she wouldn't mind me doing it on their large-format drawing printer. She was not amused. You thought consumer-grade first-party inkjet cartridges were spendy? You have no idea.)