So what has changed in the "bounce recovery" in some 30 plus years?
It's quite possible that, though this was in the book, it was not emphasized so much in training. I'm not saying that was the case - I'm saying it's possible.
Thirty years ago you had three pilots and non-computer-optimized schedules.
You also didn't have FANS or CPLDC or Datalink or L888 procedures or RVSM or RNP requirements or VNAV approaches or ACARS or cockpit security procedures or CRM topics or ..... All that stuff takes away training time from stick-and-rudder skills. I'm not saying THAT's the case, either, but it might be.