Ask HN: So, how hard was it to get your AI to work?

I have been contemplating for while about this.

All the hype about AI is very familiar to us all. Let's leave it that for this thread.

But having taken on a few things for myself, trying to get customer ready results from homegrown AI/Rag/NLP/ML etc. I have to simply admit that it is by far the most challenging aspect of my programming career.

And I have not come up with results that even remotely would satisfy a paying customer.

How about you ?