We don't hear much talk about the so-called "all-around rifle" any more because, as JB has pointed out, nowadays we have more money and can afford rifles for different purposes. While having one rifle might dictate a 30-06, many who have several don't need a 30-06 or a .270.
Yes and personally I think the high degree of specialization isn't for everyone. It may help in some circumstances but handicap you severely in another.
Of course if you stay at home and hunt one micro-environmental niche every year,specialization may be the best answer.You know what to expect.
The 30/06 and 270 are traditional all rounders but truth is there are a bunch of them out there today. A lot of water has passed under the cartridge bridge since those two came out. With todays bullets there are lots of "all round " choices.
