I remember a big stir before that around 2008-2010. Prior to that 308 was possibly the most popular cartridge, but all of the sudden 6.5CM was the new fad. It is a good cartridge, I do shoot it. But I still find the 308 to be a great cartridge and shoot it also. I'll be curious if I keep shooting 6.5CM after I get my 6.5PRC built. I have a few Hornady dies, some I got in trade, They're ok. I have one micrometer, a non-clicker.
I really think the success of the 6.5CM was in part due to it only requiring a barrel in the LR-308. Those semi-autos dwarf the bolt action market. Same story with the 300blackout.