What I've definitely learnt here is you don't even need fancy prompt engineering to build usable basic web apps with GPT-4.

You do need at least a basic understanding of how programming works so you can troubleshoot or provide useful data for ChatGPT to understand where bugs are. First versions rarely work 100% and it needs to be told things like the structure of data returned by API calls.

(It's pretty good at researching the endpoints itself, but other bits it needs to be told.)

However, as an "assistant" tool it is incredible no question about it. And in just a few months this note will absolutely be very outdated.