The solution is to understand the total system, to design it in a way that allows all the pieces fit nicely together, so that initial learning as well as usage are both optimal.
Complexity can be tamed, but it requires considerable effort to do it well. Decreasing the number of buttons and displays is not the solution.
Donald A. Norman
An American researcher, professor, and author (The Design of Everyday Things). As Apple’s User Experience Architect (90's), he became the first person to have UX in his job title.