As I said, I think it depends on what's being made.

I've made a few internal web browser-based tools recently, and I let Codex and Claude handle the entire frontend. Don't really care about the details there.

Tool is not exposed to the internet and they had limited scope. I handled the important details on the backend myself, and I reviewed the integration tests carefully.

These tools would just simply not been made without Claude and Codex.

YMMV as they say.