Cheaper than the mean perhaps, but again not bottom of the barrel for many of these models.
However, even if you want to keep focusing on these being 'cheap' vehicles, it STILL stands out in the industry as highly unusual. Even back in 2015, 96% of vehicles from other manufacturers had these devices (https://www.iihs.org/media/0e14ba17-a3c2-4375-8e66-081df9101...). It's a pretty easy argument to make that consumers would not be looking specifically for a feature that is near universal elsewhere. It was an abnormality and Hyundai/Kia will, unsurprisingly, pay for it in the long run.