I just tried this:

  >echo bollox
  >history | grep bollox

and got a long line of results, dating back to 2019 [Who knew I swore so often in my terminal!]

I don't have any of the fixes suggested in the article in my .zshrc so either it's duff info or not all OSX zsh installs are setup the same. Mind you, I'm still running OSX Mavericks so my zsh may not even have come bundled as the default shell. I may have enabled or installed it myself at a later date.