I know Google has some AI stuff available for their phones in the photos app (and some that offloads it to the cloud). Is there anything available or preloaded on other phones that use the snapdragon chips and actually take advantage of these AI cores?
At the top with your X4 you have your benchmarking chip. It's the core you'd rather not use because it's so power and thermally costly to engage, but sometimes we'll use it on gaming or complex websites.
The five middle chores are the workhorses. These are the ones that provide great performance without consuming a ton of power. They are the most efficient option available with user visible performance impact. It makes sense we would want as many as possible.
For the little cores, these don't see much use when you're actually using the phone. These can be as slow as possible as long as background and idle tasks get done eventually. I don't see a reason to have more than one other than the twin core cluster design of the A500 series.