No offense dude, but you're reaching the point where it's like a person makes a meal. Then you come along and ask why they made it, and then say their reasoning isn't good enough.
People don't change unless they see an advantage in it or are forced out of necessity. Obviously the development of platemail was something the Ottoman military didn't find useful. Their victories, defeats, and native environment speak well on this. Are you looking for a POD? This might help you better in seeking your answers than the senselessly seeming argumentative tone you're taking with OTL.
People don't change unless they see an advantage in it or are forced out of necessity. Obviously the development of platemail was something the Ottoman military didn't find useful. Their victories, defeats, and native environment speak well on this. Are you looking for a POD? This might help you better in seeking your answers than the senselessly seeming argumentative tone you're taking with OTL.