Jtsummers parent
https://en.wikipedia.org/wiki/Bob_Frankston - CS at MIT, apparently. So he at least may have been.
Oh thanks! I didn't realize. Surely he had contact with Sussman's ideas then.
The reference for this is the Brad Myers paper referenced in this tweet:
https://twitter.com/jackrusher/status/1553392739986952194
(The paper is very good.)