I'm curious what you've used it for? I was firmly in your camp until about a month ago when i used codex to dust off an old side project. I hadn't touched the project in six months. This was literally my first prompt:

"Explain the codebase to a newcomer. What is the general structure, what are the important things to know, and what are some pointers for things to learn next?"

Once I saw the output I giddyup'd and haven't looked back.