I doubt you have AI in devices and drones, it's just not necessary for them to be that smart vs machine learning and good standard programming.

Why put way more brains in a machine than needed?

AI will be large computer banks and machine learning will do the rest. If you get real smart AI you can make it so it can't reprogram itself much like how humans can adapt but only so much. Core code stays the same and the AI is limited to it's original design vs just being able to do anything it wants.

AI will also be limited by the hardware so exponential growth in intelligence is not likely just like humans can't get smarter than their brains limits and instead require many humans working together for the most complex thought.