I believe they are just a bit on hold. First of all there are plenty of places in the world where they are not as strict with the emissions as Europe and US. Secondly the latest IC engines have next to zero NOX emissions:
https://www.autoexpress.co.uk/car-ne...o-new-research - meaning they have almost reached the limit. Thirdly e-fuels are coming in larger scales in the future. With e-fuels you turn any ICE car into a climate friendly C02 neutral car. Even Formula 1 is going for e-fuels in a couple of years.
https://www.cnbc.com/2018/06/07/carb...-gasoline.html
So in a few years we can drive our ICE cars as we always have done without thinking about pollution. I also believe that is why Audi has decided for diesels in all future S-versions.