I think gun and ammo manufactures dream this crap up just to get you to spend money.
Not true. They dream this stuff up, as you know, because because prior to its invention it does not exist. There is a niche for everything and everyone...for instance .17 rim fire. The market will bear a lot of things.
Some folks just have an itch that can't be scratched. And it is not necessarily a hunting thing. Trying, buying, using, owning, trading, keeping just about whatever it takes until one of several options is exhausted...money, time, patience, accuracy, persistence, no more storage space, the "Boss" has had enough, or this one is "just right", etc.
I like shooting different guns and I like to gage how it feels and how accurate I can shoot it when doing it. I am always the "yardstick" of my own preferences. Some day I might luck into a combination that naturally "just fits". Looking forward to it too. But I remain a Traditionalist with a preference for the old flat nosed and round nosed tubular magazine fed ammunition in the .30-30.
Fortunately, when I want to "reach out and touch something" there is a weapon of my own choice that someone invented, that someone marketed, that I bought, that suits my specific needs and circumstances.
It is all good. Now, let's just hope it stays that way.