It probably should have stayed in the EU at this point. The empire would have given that to inquisitors when hunting jedi. The separatists would have gotten enough for at least grevious to have some. Bringing in magic anti jedi armor in a prequel gets really problematic.
It’s extremely rare, not particularly well known, difficult to work with, and not very durable. You saw how Darth Bortles’s helmet sustained lightsaber hits but broke from a punch. It has limited usefulness, but Sith armor is one use.
Nothing is so extremely rare that the empire wouldn’t have it. Arguing Palpatine wouldn’t have heard of it seems like a dead end. You can maybe argue palps wouldn’t give the separatists something that useful, but his dedicated jedi hunters would have had it.
It probably should have stayed in the EU at this point. The empire would have given that to inquisitors when hunting jedi. The separatists would have gotten enough for at least grevious to have some. Bringing in magic anti jedi armor in a prequel gets really problematic.
It’s extremely rare, not particularly well known, difficult to work with, and not very durable. You saw how Darth Bortles’s helmet sustained lightsaber hits but broke from a punch. It has limited usefulness, but Sith armor is one use.
Nothing is so extremely rare that the empire wouldn’t have it. Arguing Palpatine wouldn’t have heard of it seems like a dead end. You can maybe argue palps wouldn’t give the separatists something that useful, but his dedicated jedi hunters would have had it.