This article is pure awesomeness, Vitaliy. 👏👏👏👏👏
I first read about the Dreyfuss model in Andy Hunt's Pragmatic Thinking And Learning book. I highly recommend reading it.
I would add one more thing based on my experience.
Self reflection can boost your development, no matter on which level you are.
I am regularly reflecting on almost anything I am doing, no matter on which level I am with that specific skill.