I specifically got rid of 243 and 257 caliber rifles I owned to aquire a 270win. Why?

First the little stuff is handled by 5.56 or 22-250. If I need 80gr or heavier the 270 can deliver. In pre covid times 270 ammo is cheap and everywhere. The only real competitor that is small in bore size and popular is the newer 6.5 creedmoore.