This tells me that you haven't used GPT-4 (Thats not the free ChatGPT), or have not learned how to prompt properly. You can't ask Stack Overflow follow up questions. If the code from stack overflow does not work in the way you expect it to or the answer is not 100% accurate, you can't ask Stack Overflow to correct it.
Also, its better in the hands of Senior Engineers who can evaluate answers for correctness, because just like Google/Stack overflow, it can be wrong.
My experience with GPT-4 is that it's been amazing for python and mediocre at DAX. It frequently hallucinates functions, gives code that can't run, or does not fit the prompt.
It is still helpful, but there's a big gap between how helpful it is, depending on the tech.
Also, its better in the hands of Senior Engineers who can evaluate answers for correctness, because just like Google/Stack overflow, it can be wrong.