I mean, ideally any training should be like that. People are set in their ways though.
The aerobic and neuromuscular efficiency has to be built eventually (and can even be integrated in if it doesn't interfere with recovery in the beginning). But I am of the opinion that increasing lac threshold and strength/power will have stronger carryover once you do that.
What separates elite endurance runners isn't Vo2max because all of them are up there... it's the lac threshold that is what is correlated with finishing place.