One of the things I saw when playing with it is that they emphasize searching and intellisense reliant style programming with autocomplete, ie, make a guess and let intellisense tell you the object/type/whatever you're playing with. So you don't technically have to read their implementations, if you know how to leverage intellisense properly. In fact Microsoft specifically sped up intellisense with Unreal Engine (but the changes affect all intellisense users): https://devblogs.microsoft.com/cppblog/18x-faster-intellisen...