Heres a cartridge that has persevered. Why??

I've heard it said the 06 is perfect for nothing but good for everything. Heard it said the worst cartridge base off the 30-06 cartridge. Heard it said 270 & 280 = 30-06 improved....ect..ect

But yet remains well within the top 5 selling cartridges.

Not knocking it at all, I owned a Rem78 in 30-06 killed about a dozen deer with it but not much of a gauge to judge a cartridge by only killing something that can be killed with much less of a cartridge.

Now at the end of WWII there were a lot of surplus military rifles around in that chambering but that was 70 years ago and the 06 is still going strong....Why??

So why do you think the 06 has been so popular over the years??