Those vortex tabs on the wings were supposed to be a temporary fix when they first came out. Pilots had a alot of questions about them, especially since they didnt stay on that well at first.
When I speak of the vortex tabs on the wing, I mean the ones on top of the wing
To date, doesnt look like Boeing has been able to design a wing that does not need them.
Underfire, I think if you look you'll see what we call "intake strakes" (also known as 'Engine Ears' ) on most aircraft with big fan engines hanging under the wings.
That is fine, but not what we are talking about here.
The new circular tailcone eliminates a set of four drag inducing vortex generators on the aft fuselage.
