Re: time to retire the .308??
seeing as the .22lr, .223, .308, and .3006 are probably the most engineered ever rounds, most mass produced, most chambered, most scrutinized, most benchmarked, most used used, most reloaded, most components, most liked, most usefull, most simple, most recoil managed by a large cross section of the populous (except maybe for the .3006 of course), readily available, most affordable, very accurate, short action = shorter / lighter (usually), etc. etc. etc. <span style="font-weight: bold">why would it even be a topic?</span> they be still around when we use the bumps in the ground where the pyramids were for backstops.
there will still be vanilla, chocolate, and strawberry ice cream long after the specialty flavors of the month are gone (no offense or disrespect to the .338, 300win mag, .300 ultra mag and other ultra mag family, .358, 6MM family of loads, .260, .280, 7mm family of loads, certainly not flavors of the month, but you know what i mean).
might as well retire the 12 ga, 30/30, and .45 acp too.
taxes, death, and the .308