For example, the other day I asked a major LLMs to generate a simple markdown viewer with automatic section indentation for me in Node.js. The basic code worked after a few additional prompts from me.
Now I wanted folding. That was also done by the LLM. And then when I tried to add a few additional simples features, things fell apart. There were one or two seemingly simple runtime errors that the LLM was unable to fix after almost 10 tries.
I could fix it if I started digging inside the code, but then the productivity gains would start to slip away.