j7+ vs older Roombas: j7+ stops for pet waste, older ones smear it everywhere

The j7+ uses a front-facing camera and AI to recognize hazards like cords and pet waste, stopping before contact. Older Roombas bump around blindly and smear dog accidents across the floor. For pet owners, that’s the difference between a minor cleanup and a full-scale carpet disaster — the single feature that justifies the upgrade.