Pretty much anyone who's not you, will make code in an unpredictable way. I review other people's code and I go 'really, you decided to do it that way?' quite often, especially with coders with less years of experience than me.
That's kind of how this is starting to feel to me, like I'm turning more into a project manager that has to review code from a team of juniors, when it comes to A.I. Although those juniors are now starting to show that they're more capable than even I am, especially when it comes to speed.