Personally, I am stunned at how fast - and autonomously - you can get to a very decent 80/20 result with AI these days. And since Opus 5.5 was released I really think it hit another level.
As an example, this was a "silly" one-shot prompt/result I created/received, which goes into a similar direction of what Felix created in terms of UX and aesthetics:
https://poster-pillar.sidequests.p-john.com/
Sure it lacks the finish and attention to detail. But this was one prompt (vs. 60 threads).
Thoughts: I find this both exciting and a bit unsettling. Idea-to-product time in tech just keeps shrinking and shrinking. I feel limited by my own ideas now (1), and by the fact that everything still remains "digital" - ChatGPT still can't build me a house or fix my broken knee (2).