My experience is that it is a good source for leads on things to do but not for convincing facts. And an LLM is good for that too. I still end up needing both.

An example of something is someone posting that their AKG headphones will only charge on the USB-C plug if the other end is USB-A. I couldn't get mine to charge, and that was the answer. That answer existed only on Reddit, until recently when someone had that same problem on another forum.