Is there some rhetorical issue here? The ABS sensor was integral to the hub/bearing. Not only that but most vehicles today have pre-assembled hubs with or without ABS and cost in the hundreds of dollars. Previous hubs were serviceable and the individual bearings usually cost less than $12 per wheel and a first year high school vo-tech student could replace them with common hand tools in less than an hour. And also, bearing rarely failed, often lasting hundreds of thousands of miles while todays costlier hubs fail often. I have replaced many more hubs in the past few years than serviceable bearings in the many decades prior. I can likely operate any of my 'primitive’vehicles as safely and more economically than any new top of the line automobile.