I think you missed his point. His point is not that there are no other cars using EyeQ3. In fact he said there are over 2 million (while Tesla only makes up ~150k of that). The point is none of those cars come even close to matching the capabilities of AP1 or AP2 (see your own review link for the BMW for example). This seems to suggest that the success of AP1 is not an inherent part of EyeQ3 (because if it was an inherent part of EyeQ3, then all the lane keeping systems using EyeQ3 should be as good as Tesla's).
Supercruise is pretty much the only system that seems to have a chance (we'll see the reviews when it comes out). However, even that suggests it is not Mobileye that deserves the credit, but rather GM's extensive development (if you are to trust GM's PR).
This is not true. IF you actually read the reviews, a lot of these system actually perform well on well marked roads. which is what they are intended for. but they struggle in curves and when the lane fades. which is a problem tesla had from the start, but has improved upon with their high precision map.
secondly, unlike tesla these companies don't have hundreds of developers dedicated to one feature. Which is the reason tesla was able to develop a map system using gps logging in connection with vehicle's speed. This allowed them to drive better when the lane fades and in corners. Elon ofcourse hyped this up as "fleet learned road curvature".
The reason the new DrivePilot 4.5 will match or even exceed autopilot is because for the first time it is also using map data (HERE maps).
Mercedes will give Tesla's Autopilot its first real competition this year
However GM supercruise will actually transcend autopilot and that's due to it also using its own lidar map.
Another example is tesla using the car object detection and tracking that mobileye provides to do car following. again all these functions are available, its up to you to use it and tesla pretty much had unlimited resources to devote towards it.