I originally asked a question (Comparisons between the A340 and 747-200 wing: sweep angle and span) about the technological developments which allowed the Airbus A340 to have a wing with greater aspect ratio and lower sweep than the Boeing 747-200 wing, despite being designed to carry roughly the same number of passengers. @Koyovis graciously replied that a lot of the ability to design a lower-sweep and higher AR wing was a result of supercritical airfoil development. However, I had a follow-up question that I was encouraged by other commentators to post directly.
As far as I'm aware, the first supercritical sections were introduced on the generation of aircraft launched in the late 70s - early 80s (767, 757, A300, A310). The Airbus A340, along with the 330 and 777 however were launched a decade later, in the late-80s - early 90s.
I am curious whether the airfoils on these latter aircraft incorporated any improvements to their supercritical sections over the late-70s - early-80s generation of aircraft? If so, I'm curious as to what specific improvements were made?