Yeah, I swear. They're a hardware company more than a software one... it shows in their utter lack of imagination for their software. Even their UI/UX design is really suffering compared to their competitors.

Disclaimer: I continue to use an iphone primarily because I'm happy and fine with the walled garden.

With a codebase as large as iOS its highly unlikely that all 0days will ever be fully patched. Apple is constantly iterating on their code and introducing new features(and bugs) and security engineers are always coming up with new methods to exploit code.