AAPL's capacity for sustainance is doubtful, when they are giving money back to investors. What is the growth path for them ? They will continue to milk successful product but no "next" strategy in sight.
No apple watch or AirPods, till there was, and guess what Steve Jobs isn't there. Wearables increased by 50% yoy. There are many different areas that Apple will move into, AR, automation, home, still plenty of room for growth
Steve Jobs was not magic, nor is he the only person with vision in the world. Expecting one company to continue to make paradigm breaking technologies every other year isn't realistic.