Great article. It mirrors my own experience as well: I think restraint is one of the qualities of great design that is the easiest to overlook for outsiders. Usually it’s only noticeable when it wasn’t practiced.
Lately I have been thinking about how relevant everything I have been taught in my (then) almost entirely non-digital, Bauhaus-inspired design school over 13 years ago. The fundamentals never changed. I use them every day.
I still think a proper education in design theory (whether in an academic setting or self-taught) is indispensable. It helps designers to look beyond what is possible, and instead focus on what is necessary.