This pricing strategy is as common for the auto industry as in any other: [1] "If one company bundles products, its competitors are always better off not bundling; the thing to avoid is a head-to-head competition wherein the only way to get an edge is by cutting prices"
If/when VW unbundles their pricing, another auto player will come up with a alternative version of that, and it is to consumers/gov. To decide if this is fair and advantageous.