It works well if you know what to use it for.
Ever had something you wanted to Google, but couldn't figure out the keywords?
Ever saw someone use a specific technique of something, which you could describe, but wouldn't be able to find unless someone on a forum asked the same question?
That's were chatgpt shines.
Also for code it's pretty sweet
But yeah, it's not a wiki or hard knowledge retriever, but it might help connect the dots