I think the thread is about the .30 AR not the .30 hrt. But I don't see where the .30 AR offers much over the old tried and true 7.62x39. Sure its a few more feet per second on what I'm reading tho that is kinda debatable (stats I read were for a 24 inch test barrel for the .30AR, didn't say what length for 7.62x39) Even if it does provide in my opinion a marginal advantage I'm not sure I see a real need for it personally.
The real reason I think its not getting much love is the same reason many new cartridges don't, they are something new, not the tried and true ones. Sure a few people will jump on the newfangled boat, others that don't see a big advantage will wait and see if it sinks or floats.
Oh and just for the record with the 7.62x39 ya can keep ya pointy bullets if that is all that important to ya, even feed em thru high capacity magazines.
What I really don't get where all you other semi auto guys get ya panties in a bunch because someone mentions a .30-30 that you automatically assume to be a tube fed lever gun.
My .30-30 is bolt action and feeds off a removable magazine and I can shoot pointy bullets just fine in it.