alt Hacker NewsMemory Tagging Extension is an Arm architectural feature, not an Apple invention. Apple integrated and productised it, which is good engineering. But citing MTE as proof that Apple’s model is inherently superior misses the point. It doesn’t address the closed trust model or lack of independent system verification.
Your claim wasn't about inherent superiority or who invented what, your claim was "that Apple's approach is security by obscurity with a dollop of PR." The fact that they deployed MTE on a wide scale, along with many other security technologies, shows that not to be true.