Ahahahahaha
What's that thing they say about CFD goggles...
On a serious note, every year computational power increases, design tools get more complex and the idea of a concept becomes a lot more micro.
There's probably a lot of different flows on the car with each area having it's own concept.
Lot's of little changes making big differences.
I also suspect they are doing more with the underfloor than the regs originally envisaged.
