In the 2000s, competitive things like surgical subspecialties still had average step scores in the 230s and people only applied to a couple dozen programs. The modern environment with a ~250 target score, 70+ programs applied to, and step screening as a major way to weed down the applicant pool, is all a positive feedback loop that has only popped up in the time since their last evaluation of scoring. Not to mention the whole preclinical hijacking that is also newer, with resources like Boards and Beyond, Pathoma, or Zanki coming out in the last ~5 years and essentially supplanting the whole curriculum for a lot of students who realize their priority in life now has to be board scores.
I doubt they'll make the full jump to Pass/Fail, but something like a shift to reporting quartiles is going to have a lot better chance now than a decade ago