What makes magnetic gearboxes so cool?

I have made a lot of things with mechanical gears so far but you know they have some inherent problems. Noisy operation, needing lubrication or wear on tooth. I wouldn't really call them problems though. Because very high torques can be transmitted with them. But we also have an amazing option like magnetic gears, which don't require contact because they work through magnetic forces. For this reason, things like wear or damage due to over torque in mechanical gears do not happen with them. Also, one of the most beautiful things about magnetic gearboxes is that they work much quieter than mechanical gears and they absolutely do not need any lubrication.