AFAIK, 1970s energy crisis pushed Europeans to invent efficient small cars so let's hope this crisis pushes EU into completely abandoning fossils in favor of electricity generated by local means like nuclear, solar, hydro, wind etc. Even if the war doesn't go long enough, the contrast between Spain and Italy in energy security is stark enough to make a point.

Maybe Trump is playing 4D chess after all, pushing Europe into independence so US can spend its energy on China :)