“That’s a very popular chambering these days.”
Mostly in the gun press.
Few have purchased ANOTHER AR-15.
Most folks are looking for the basic home defenders...pistols and shotguns.
I was at our range a while back and everyone on the rifle range was shooting 6.5 Creedmoor. One older guy said he can shoot it all day long without a sore shoulder, so it’s his new favorite.
I know a lot of people that own rifles in that chambering.
AR sales numbers strongly disagree. Most gun stores are long back ordered for black rifles, but still have some shotguns.