Palatino, Optima, and Melior were heavily used, I would say overused, in the late 1970s and early 1980s. A friend who went to Rochester Institute of Technology when Zapf was there (as a visiting professor, I think), said that in a lecture Zapf said that he had never intended Palatino to be used for body text, producing some gasps from the audience.
But he did remarkable work.