...unless you're making both the screw and the nut, in which case I suppose it's unimportant that it's a weirdo pitch.It's no different than doing any multi-start thread except he has chosen a thread pitch that matches the leadscrew and a lead that is a multiple of it. Kinda interesting if multi-start threads are a mystery but not much practical use (the method, that is).
A vee form 6 start thread has few practical uses....unless you're making both the screw and the nut, in which case I suppose it's unimportant that it's a weirdo pitch.
But I agree, little practical use beyond learning threading (in an odd way)