It's 99% advertising and marketing imo. No game animals can tell the difference between a .264 bullet and a .277 bullet of the same kind traveling at the relatively same speed and I could just about guarantee that the 6.5 cartridges outsold the 270 and 3006 combined by a bunch over the last 5 years.Imo I agree that it has slowed the classics down and I'm sure that if pushed it could spark a whole argument with the crowd that always has to have the latest and greatest