I was in the Walmart in Charlotte, Michigan the other day.
I paused by the sporting goods department to ogle the firearms.
Every centerfire rifle was a 30-06.
For those who are not into rifles, the 30-06 has been in the top-five selling chamberings for over a hundred years. Fads come-and-go but the -06 keeps chugging along.
One reason for its longevity is that commonly available bullets are "dialed in" to expand at 30-06 velocities. It is often written that there is nothing native to North America that a 180 grain soft-point from a 30-06 in the heart-lung area will not kill.
Modern advances in projectiles, powders, rifle stocks, recoil pads and scopes make the 30-06 more potent than ever.
But the real reason all those rifles were chambered in 30-06 is probably because they have 10,000 chamber reamers for 30-06 in the back-room at the factory. Supply chain issues, don't ya know.