1) Ken Iverson who invented the APL programming language and went on to win the Turing Award in 1979, had already published 'that one little book' that was considered insufficient for tenure, but which formed the basis for the award.
2) tubes remained the main focus of MIT faculty for quite some years after the transistor was invented. It was Robert Noyce and the people he worked with at Grinnell College who knew more about transistors than MIT : https://web.stanford.edu/class/e145/2007_fall/materials/noyc...