The average person has no idea what to use AI for to get substantial value out of what it can now do.

It's the switch between: know which service to use, consider capabilities, try to get AI to do a thing, if you even have a thing that needs done that it can do; versus: AI just does a thing for you, requiring little to no thought. Very active vs very passive. Use will go up in direct relation to that changeover. The super users are already at peak, they're fully engaged. A software developer wants a very active relationship with their AI; Joe Average does not.

The complexity has to vanish entirely. It's the difference between hiding the extraordinary engineering that is Google search behind a simple input box, and making users select a hundred settings before firing off a search. Imagine if the average search user needed to know something meaningful about the capabilities of Google search or search in general, before using it. Prime Google search (~1998-2016) obliterated the competition (including the portals) with that one simple search box, by shifting all the complexity to the back-end; they made it so simple the user really couldn't screw anything up. That's also why ChatGPT got so far so fast: input box, type something, complexity mostly hidden.