Mohawk,
I could agree that an '06 roughly covers the same ground that many other cartridges do, and I don't think so much variety is a stark necessity for many of us. However,
I find the plethora of cartridges to be nicely consonant with our capitalistic economy and freedom of choice to follow whatever idiosynchratic ballistics pursuit that we want to. For many of us, that's the fun of it. I have rifles in a dozen or more CF cartridges from .223 to .45-70. That's a lot of dies, bullets, brass, powder, rifles, scopes, mounts, and what not that helped somebody to have jobs, and me to have some fun. I don't think I would own that many '06's. So what's wrong with the variety?
One thing that is evident here at GBO is that there are many folks who do enjoy and know how to maximize the potential that many cartridges have with different loads, bullet types and weights.
It isn't some sinister, evil thing to invent a new cartridge or a new load and want the shooting public to embrace it. The market will decide if it is a success or not and I think that's the way things are supposed to work. The way I look at it, it's good for the shooting sports and it's good for the economy. It gives the "believers" something to talk about, the rifle makers some rifles to make (and sell), ammo and component makers more of a market, the tinkerers something to tinker with, the arguers something to argue about, and the whiners something to whine about. So what? Far as I'm concerned, the more cartridges and folks that want to discuss them, the merrier.
Sure would be an interesting place if everyone could only talk about their 150 gr. '06, wouldn't it.