- You're going to chop your hand off.
- It doesn’t even protect you, because the laser-hilt isn’t flush with the blade, so if a lightsaber slides down you'll just get a cut hand and a broken lightsaber.
- It solves a big lightsaber design problem, which is blades sliding down and cutting your hand off.
- Bonus: You can jab opponents with the laser hilt.
But Russell Brandom points out that there seems to be case of sliding here at 1:08 in the Anakin / Obi Wan / Yoda / Count Dooku fight, and that a crossguard could’ve helped.
The best explanation I’ve heard comes from the commenter squiz, who points out that the crossbar beams look unfocused and that maybe this guy is an old Sith "reawakened," and that he has an early model lightsaber. This seems plausible! But then the question is: did people realize the crossbar makes no sense? Did lightsabers get stickier at some point, making the crossbar useless? Is the crossbar a good idea or a dumb one? Discuss in the comments.