The Creedmoor family of cartridges has been and will continue to be the most effective launch of a new chambering to date. First and foremost, they started with a cartridge that doesn't rattle your fillings on every shot. Then they got the magazine OAL capacity and chamber dimensions in harmony while also looking @ where projectile R&D was going in order to get the twist correct not only for current offerings, but, also projectiles they assumed would come in the future. Now, the popularity has soared because it's easy to shoot well. As such, the price to shoot it will continue to fall as the volume of ammo loaded for it rises. The relatively low cost to shoot the rifle means more shooting, more practice, which makes people better shooters, some of which they'll attribute to the chambering.
Remington could've accomplished very similar results with the 7-08 and 260, but, they didn't execute like Hornady/Ruger did. Remington didn't do anything to meld the chambers to the mag-OAL capacity, nor did they do anything regarding twist rates, opting to continue to use the same twist mandrels they were already using in .264 and .284. Remington used the model: If we build it, they will come. Hornady/Ruger said, "What are people paying gunsmiths big $$ to build that we can replicate and commercialize?"
I don't have a strong feeling one way or the other about the Creedmoor family of cartridges with the exception that they are a case-study of the best executed product launch and ongoing support that the firearms industry has seen probably since the 30-06. The only other product in the last 30+ years that's even close is the hand-held/binoc-combo LRF.