In a thousand years teachers will have a hard time explaining the origins of one of the most dangerous and ill-conceived weapons ever invented: the lightsaber
I don't know much about weapons, but to me, the bat'leth always looked like it was intentionally designed to harm the person wielding it. Like they put it on the wall as a booby trap.
It's the "Cow Tools" of melee weapons. It might work to an extent, but we've had millenia to perfect bladed and spiked weapons, and somehow never arrived at anything close to the bat'leth.