The 270 Winchester needs to die because there really is no “niche” between the 25-06 and the 30-06 that needs filling, and if there is, the 280 Remington does a lot better job of filling it. Besides that, the selection of bullet weights available for the 270 Winchester is pathetic, especially compared to its closest cousin - the 280 Remington.
The 270 Winchester should live on forever because it’s a great “all around” cartridge for North American big game hunting - it shoots flat, it hits hard, it’s plenty accurate with the right person behind the trigger, and it doesn’t kick so badly that most people can’t handle it. And while the 270 has its share of detractors due to its relatively small selection of available bullet weights, who cares? Almost all of the North American big game animals that can’t be easily killed with a 130gr bullet from a 270 Winchester, CAN be with a 150gr bullet from a 270 Winchester. Besides, what big game hunters experiment with a bunch of different bullet weights anyway? Most of them just find a bullet (and bullet weight) that works, and stick with it.