Survival is down to being maintained, not many have a use for a sling and they get slung! a holster is often used and gets some care and attention. Bayonet scabbards were often removed from the blades and thrown away as they took up room, while the blade hung on the wall. I know of a collector who had an amazing collection of very rare blades, all naked as he threw the scabbards away, he was amazed to find in many cases he had thrown the money away on the item as scabbards are so much rarer than naked blades.