Yup, little bit of history. It's taken time to fully crystallize, but the real intent was to prevent stuff where lack of consideration for panning, soundscape, mixing, mastering, etc. was written off as "just part of the genre" and a whole suite of decisions mooted as a result, which we didn't want. Namely, at the time (perhaps still?) people were taking 16-bit SNES sources and "demaking" them into NES versions that were, in addition to not being particularly interpretive from an arrangement perspective, not indicative of what chiptune as a genre is capable of. That's more or less what I meant about "straight" chiptunes, but the phrasing wasn't as clear as it could & should have been.