I find it unnecessary for most non-critical code, such as client applications.

I doubt that any supposed future extra effort for the AI to add new code is remotely comparable to the upfront effort of you reviewing the code manually.

I know that this is the case today for native mobile apps, and I speak from hundreds of hours of experience over the last four months on such a project where I stopped reviewing the code.

We are already here today, and this balance is only going to further shift to the point where it is obvious that the hands-on approach is no longer competitive.