Intel used to just have branch hint prefixes but they decided to ignore them on modern (from Pentium 4) models. Perhaps Apple found a corner case where it does

Intel used to just have branch hint prefixes but they decided to ignore them on modern (from Pentium 4) models. Perhaps Apple found a corner case where it does help, it could be Intel can do some optimization that Apple cant implement due to patents, or it’s just an experiment that is destined to fail as well.