From 30,000’, it would be fascinating to understand how V6’s became adopted so widespread. It’s a good thing if they start being removed in favor of inline 6’s and V8s. FWD is another phenomenon. I’m old enough to remember Audi pushing it saying it’s easier to pull than to push. Engines turned sideways also widely adopted. It would seem that physics would not be in favor of any of this stuff.
The above and where fake dual exhausts came from, as well as the Loch Ness monster, may simply go unsolved for generations to come
Front wheel drive: more stable and better traction in snow vs RWD, more efficient than AWD, more passenger space for a particular size of car (no driveshaft hump)
Transverse engine: shorter hood means more passenger space for size of car, better packaging with crumple zone, no need for bevel gears to change direction of rotation
V6: acceptably smooth, small packaging (crumple zones, short hood) , short enough to allow transverse mounting