Apple will make hacking iPhones much, much more difficult via memory integrity enforcement (ARM memory tagging). This technology will make many classes of exploits impossible. In all models of iPhone 17. If you're a concerned HVT/VIP, buy the new iPhones. https://security.apple.com/blog/memory-integrity-enforcement/

Memory Integrity Enforcement: A complete vision for memory safety in Apple devices - Apple Security Research
Memory Integrity Enforcement (MIE) is the culmination of an unprecedented design and engineering effort spanning half a decade that combines the unique strengths of Apple silicon hardware with our advanced operating system security to provide industry-first, always-on memory safety protection across our devices — without compromising our best-in-class device performance. We believe Memory Integrity Enforcement represents the most significant upgrade to memory safety in the history of consumer operating systems.