i think kylo ren’s lightsaber is a demonstration of the Galaxy “situation” we’ll see in the new Trilogy…i like to think that he has the dusty/broken-ish lightsaber instead of a clean/pretty lightsaber like darth vader had or darth maul had is bc the galaxy still is n War the Rebels (now Resistance) still fights the Empire (now First Order)…so in this galaxy far far away i think the world is more raw and dark and they are living in a post (bigger) war/new war world…yeah i know i am thinking too much maybe it’s just a old lightsaber lol