Wrong. CNG burns quite nicely in diesel engines. Rail and truck companies are quite rapidly developing and implementing the technology and infrastructure to use it. And of course, CNG already works nicely in spark-ignited engines. Lastly, CNG can be up-converted to heavier HC. So it is NOT "all about oil".
For 50 yrs people have talked about what’s about to happen.
Ask some guys at truck stops who of them is using anything other than diesel fuel to move food interstate.