I've found that one of the best use-cases is to create simple tools. Similar to what simonw does. I've done so here: https://www.ashwinmenon.com/clean_logs/ or more descriptively here: https://www.ashwinmenon.com/posts/thoughts/2025-12-04-are-we... (at the bottom). LLMs are really good at coming up with code from scratch, and getting a lot of the boilerplate out of the way. If you want changes though, it helps to be a programmer and be familiar with the stack.
I've also created a more real "app" at https://www.hunchle.com, which is a trivia app. It was a real challenge since LLMs hallucinate all over the place, and given labs are benchmaxxing, it gives me a real good idea for how good LLMs really are.
I've also created a more real "app" at https://www.hunchle.com, which is a trivia app. It was a real challenge since LLMs hallucinate all over the place, and given labs are benchmaxxing, it gives me a real good idea for how good LLMs really are.