I would expect that most apps generated today contain at least some Ai generated code, whether through chat completion or agentic use. But, I think such tools currently mostly support people who already are able to create apps.

As others have said, I think a lot of the difficulty in creating an app lies in making the numerous choices to make the app function, not necessarily in coding. You need "taste" and the ability to push through uncertainty and complexity, which are orthogonal to using Ai in many cases.

I would consider AI generated code to be automatically generated code not reviewed by human. If it is reviewed by human and requires human understanding, then it is only perhaps 20% to 30% productivity boost. From my personal test, automatically generated/tested code without human understanding are not there yet