I’ve never seen code that is unimportant. It’s either being used or not. If it’s boilerplate, it can be abstracted away. There are domains that are riskier than others (debug logging vs crypto for auth), but sometimes bugs in a somewhat safe place can lead to some catastrophic issues (you do not have to break a crypto algorithm if the key can be leaked via logging).

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.