fad, fashion, won't be here long. I can't really say if the wsm is in that catagory,but when i went to find a good deer\sheep\mtn goat gun, this cartridge just seem to stand out. I can still have the tradional jack oconnor sheep caliber but with a modern twist. The 270 wsm just seams to be my go to gun anymore. The .30-06 just doesn't come out of the gun safe anymore. The .338 only gets used on elk hunts. The .270 wsm with a 4x12 scope just seams to work.
But than again,. there is no such thing as deader.
Besides if we all shot the old guns, there would be no reason for r & d departments. engineers wouldn't need jobs etc.