It's a different kind of fatigue, but it's something a felt I got stronger at over time. Beats waiting IMHO, but be sure to give yourself a chance to rest.
really interested in what the brain does when it "loads" the context for something it's familiar with but is currently unloaded from the working memory. Does it mostly try to align some internal state? or more just load memories into fast access
The next step is running an LLM that tries to figure out parts of the project that you aren't working on so it automatically starts coding that while letting you code in peace other stuff manually.