I think you're talking about the flow state, which makes sense. I've said it before there was an aspect to programming that was almost meditative, that zone where ideas flow easily into code. I do miss that experience. (I also suspect the lack of it contributes to the burnout reported by heavy AI coders.)

Unfortunately, most modern software development is atrocious, full of distractions and incidental complexity and tangential issues that are not conducive to staying in the flow. Latent bugs and dependency quirks and environment issues that force you into some irrelevant sidequest were the most frustrating. Like, this video is the prefect analogy for modern software development: https://www.youtube.com/watch?v=AbSehcT19u0

I do NOT miss that experience and I'm glad to let the agents take care of it.