If you go lurk on some of the social media platforms that cater to younger shooters, you see a whole lot of talk about ar platform cartridges and a few other darlings like Creedmoor, 6.5 PRC, 308, a very few others. What you don't see is much talk about anything else, and there's a pretty strong undercurrent of derision towards "fudd guns" and "boomer lore" and the like.
Unless the consumer patterns of the younger shooters change as they age, there will be a bunch of chamberings that are going to dwindle into obscurity.
