Robot lawn mowers have quietly become one of the most successful home robots after the vacuum. They map the garden, trundle out on schedule and dock themselves when the job is done. Yet one chore has stubbornly stayed with the homeowner: dealing with the blades. Dull blades tear grass rather than slice it, and swapping or sharpening them means handling sharp metal under a machine. On November 3, 2026, Pudu Robotics, a company better known for the delivery and cleaning robots used in restaurants...