Any good design has a timelessness that transcends fashion. Whether you consider a toaster or a car or an airplane, a successful design starts with a good robust understanding of the balance between performance, looks and customer requirements.
All successful designs have one thing in common: they must adapt well to evolutionary improvement. The 1950 Cadillac and 1969 Mustang are works of art to some and cherished classics to others. But by today’s standards, they aren’t very comfortable or fun to drive; nor are they still in production. Does a new paint job and state-of-the-art avionics make a 60-year-old design contemporary?