But on POSIX systems, there's a reason for that. There's only one success (Since "success" should do the same thing every time), but many types of errors which can be indicated by the return value. You could argue that 1 should be success, and >1 should be failure, but that's a minor quibble.

Conversely, here it's just because "it's different". I feel that this is a bit if a shame - some of the other parts of the project appear quite interesting, but making fundamental decisions in downright wrong ways just to mess with expectations comes across as silly to say the least. Why deliberately increase the learning barrier and drive people away?