It seems to me that with the transformer model world we now live in, utilities like these are excellent at generating things that appear in many tutorials/posts/etc. However, there's little-to-no evidence that they are able to generate anything truly custom. For instance, any application requiring any significant level of domain-specific knowledge (your last point), and given the model's architectures there's no reason to believe that will occur. What is it that makes you so confident that will become a possibility?