H4831, I almost agree with you....however, the .356 and .307 are not necked-up .30-30's; they use a whole new case. And quite frankly. if I expect shots to be beyond 200 yards on moose, I would much rather have the 1450 ft-lbs of energy from the .356 vs the 790 left in the .35 Remington. The part about hitting well is right on the money though.
I also think you'll find that although most professional gun writers are LENT free rifles to test, they are required to return them. But they are in an unusual situation. They are testing a new gun and or cartridge. So if the rifle is a good-looking, well-functioning arm, and shoots accurately, and the cartridge is able to fulfill its intended purpose, what do you expect them to do? Lots of them have decried the ridiculous number of recent cartridge introductions, but they go unheeded. The honest truth is, there have been very few truly needed cartridges developed since about 1925, by which time we had the .250 Savage, .45-70, .30-30, .270 Win, .30-06, .348 Win, .300 and .375 H&H. Pretty much a do-all battery.
One thing we probably agree on...guns would be WAY cheaper if there were fewer chambering choices and less R&D being carried out. I'm glad I've got about all I really want already!