Have you seen recent Volvo, BMW and Mercedes systems? They all have good lane keeping and adaptive cruise / stop & go for several years now. And I'm sure there are many more that I'm not aware of.
I have seen and driven recent BMW, latest VW (ID.3) and OpenPilot on Toyota RAV4 was giving me a much better experience in both lane keeping and as a product (driver monitoring, communication with the driver, overall UI and UX). BMW, VW score by having maps data integrated, that allows them to adjust speed for curves and traffic signs. However, it is not directly related to what comma is doing right now, so I am taking it out of the equation.
Moreover, I think adding map data is just a matter of time for Comma.ai and I can imagine that adjusting speed in before entering a steep curve will be much better solved with vision, which seems also to be on Comma's roadmap.
This is intended to provide functionality for all the rest