What makes a self-emptying dock worth it for a robot vacuum?

A self-emptying dock turns a robot vacuum into a true set-it-and-forget-it appliance by letting you go weeks without touching it — the robot empties its bin into a sealed bag, and you just toss the bag when full. It removes the chore that makes a robot vacuum truly hands-off, ideal if you have allergies, long work hours, or hate dealing with dust.