The 6.8W is a great cartridge. Ammo, bullets, brass all easy to get though you may have to order online. It is a sweetheart to shoot and a hammer on game. Easy to hit reported velocities with factory ammo and handloads and very accurate. The 270 is no slouch and tough to improve upon perfection, but the 6.8W can handle the higher BC / heavier 270 projectiles in factory persuation
While the 6.8W did not take off like say, the 7prc, few cartridges do but that does not mean they are “dead”. One advantage of the 6.8W is it is loaded by Winchester which is a giant ammo company compared to say Hornady and you may be able to get Win ammo in times of crisis while other even more popular cartridges loaded by smaller companies are not available. A case in point is 6.8W ammo was one of few rifle rounds available during Covid.
Lou