Yeah I forget that the internal combustion engine is so old my last first generation American family member was still alive, mind you he was ancient even by modern standards but still. Ya kinda get used to tech advancing massively over time if not in form then in function that it's easy to forget that's not universally applicable, after all my Kbar isn't too different from a neolithic stone knife you could give it to a living Otzi and he'd know what it is.