The early ones were noteworthy for being novel, but (IMO as an early adopter) weren’t very good at cleaning. About ten years later I experienced someone else’s (then) modern Roomba, and it was still essentially the same crappy product, randomly banging into walls and struggling with carpet edges.
When the Roborock appeared with LIDAR, it was like the future in comparison, and frankly what Roomba should have already delivered years before.
When an established company with a big market share and opportunity for a technology lead is so out-innovated, it suggests that something is fundamentally rotten.