I find that the LLMs are good at the 'glue code'. The "here's a rather simple CRUD like program, please tie all of the important things together in the right way". That was always a rather important and challenging bit of work, so having LLMs take it of our hands is valuable.

But for the code where the hard part isn't making things designed separately work together, but getting the actual algorithm right. That's where I find LLMs still really fail. Finding that trick to take your approach from quadratic to N log N, or even just understanding what you mean after you found the trick yourself. I've had little luck there with LLMs.

I think this is mostly great, because its the hard stuff that I have always found fun. Properly architecting these CRUD apps, and learning which out of the infinite set of ways to do this are better, was fun as a matter of craftsmanship. But that hits at a different level from implementing a cool new algorithm.