OBD1 still used a serial protocol (early PWM) for most US manufacters, Bosch had their own system too. Same data just more work to get it out. OBD at least made it standardized what data a USER can access. OBD gives us access to memory directly if you know what to do with it.  

 I'm aware. But, standardization at the behest of regulators is ALWAYS bad for customers/owners of what should be private property. 

This all plays into the right to repair stuff. If you can't fix things yourself, you can't say you actually own the thing.  

 Doesn't matter what you own or build. The regulators can just revoke the insurance on any car that doesn't allow tracking. Then, you could own a car without tracking, but you can't drive it. 

 Is that ever happens, I'll just drive illegally. At that point, what they are doing is just immoral and I will do what I want with my own dang property.