Engine development porn, Audi edition: "electric supercharger" from EE
 

https://www.youtube.com/watch?v=k8-_UrfbRBA

This drew obvious parallels to me to the Formula 1 system where power from regenerative braking is used to power a system that electrically boosts a turbo plant. If you did this with regenerative brakes and programmed it or it, you could improve CAFE performance with such a system. Life left in the ICE yet!