IMO, its stewpid because why put all that work into a dry diret port kit? I'd much rather have both fuel & air going in at the same time and not worrying as much about the injectors and such.
and I never said the a returnless car would never be able to run a direct port kit. Mustangs do it so whyy wouldn't a CSVT? I would think though, it would be easier and more feasible to add another fuel system to the returnless car for it though.