The ability to query your car via the uniform OBD-II interface is considered to be a good thing by everyone except those trying to frustrate users, not a "hobbling" of the industry.

And backward-incompatible changes to an API should be considered a downside, not a benefit -- though which may (of course) be justified in the circumstance -- but which should never be trotted out, in and of itself, as evidence of superior engineering or progress, as you seem to be implying here.

Edit: One more thing: Requiring that certain information be provided through a specific interface/standard does not mean they can't also use other standards as an option or support other other features, so I don't know why all the new APIs are a point in your favor either.