My interest in the 308 has three key points.
a) commercially available ammo in a wide variety of bullet types and weights.
b) short case length, which means a shorter bolt throw for the bolt-action rifles I prefer. Faster cycle times for semi-autos as well, though it's less of a factor in an autoloader.
c) you're almost guaranteed to find ammo on the shelf anywhere they sell ammo.
The 308 is as good ballistically as what I have already, may be better in some cases. I don't shoot 1000 yards, and I have great faith in the 308 out to at least 400 yds, and probably well beyond that in the right hands.
I really don't understand the current trend toward magnum calibers and extreme bullet velocity, unless you're hunting dangerous game or shooting at extreme ranges. Incidentally, I consider dangerous game to be the big bears (grizzly, Kodiak, or polar) or African game. Hogs don't qualify in my opinion, any rifle competent for deer has more than enough oomph for a feral hog. If you whack one with any kind of 30 cal rifle, say 30-30 and up, he's in deep trouble.
The rifle used in the video way back at the beginning is definitely not a "super-caliber" weapon, more likely a 5.53 or 6mm of some sort. The recoil and muzzle blast is enough to illustrate that.
Sean