How is Haiku different from GNU/Linux or BSDs?

I am risking the one full-time paid developer of Haiku popping up here and shouting at me, because he's done that a few times before and even written to my editor-in-chief to complain. Sadly for him, my former EIC was a hardcore techie -- it's how I met him, long before either of us worked there -- and he was on my side. https://www.theregister.com/2023/01/11/haiku_beta_4/ Unix is a 1960s design…