Undocumented is much worse than your comment seems to realize. Wait until you are in a situation when the only people that know a mission critical procedure qui

Undocumented is much worse than your comment seems to realize. Wait until you are in a situation when the only people that know a mission critical procedure quit or die. This can cause entire large companies to crumble, as well as the reason so much confusion exists in development, and is also a reason the industry relies on leet code testing - if you don't know something before being hired, nobody can explain it there because they are all fixing fires or on not-really-understanding auto-pilot.