[ajconway]

> I also find it unbelievable to have so much code for a single app

This point comes up in a lot of discussions about non-trivial software. My theory is that it's of the same nature as underestimating development complexity when planning your own work as an engineer. Project after project, everyone (me included) keeps forgetting that they _will_ spend 80% of their time (and code) dealing with small issues and edge cases in their product.

Who hasn't thought at some point that they can write a Twitter clone in a weekend, or hasn't been fascinated by the amount of simple bugs in someone's else product, thinking that they are obviously just bad engineers.