The question isn't whether the code is complex algorithmically, the question is whether the code is:

* Too large to fit in the useful context window of the model,

* Filled with bunch of warts and landmines, and

* Connected to external systems that are not self-documenting in the code.

Most stuff that most of us are working on meets all three of these criteria. Even microservices don't help, if anything they make things worse by pulling the necessary context outside of the code altogether.

And note that I'm not saying that the tools aren't useful, I'm saying that they're nowhere near good enough to be threatening to anyone's job.