It's a catch-22. Everybody wants cartridges that are common and time tested and therefore a lot of great cartridges bite the dust. The .30-06 is 110 years old and we now have more powerful cartridges that are more efficient but they just languish because folks don't want anything new. So you're told by your peers not to buy a cartridge that isn't mainstream but then that cartridge will never be mainstream because everyone is warned to stay away from it. Obviously cartridge designers have made great strides in the last 100 years but 100 year old cartridges still rule the day.
