I'm pretty sure I heard Frank say in the EDS podcast that he still shoots his .308s quite regularly. Is it the perfect cartridge? No. Are there better performing rounds out there? Yes. But it still works just fine in skilled hands!
One of my favorite rifles is a 16" 308. It's a nice shooting gun and the short barrel fucks with a lot of older guys that think you can't shoot long distance with a short barrel. There are plenty of other calibers that do perform better but that's what's nice about having more than one gun or a switch barrel setup.