I was a student at the 2018 racket school mentioned in the link.
All of the instructors, including Felleisen and Butterick, were nothing but helpful and friendly inside and outside of the classroom.
Even taking that link completely at face value that Felleisen is a Torvalds-type asshole in certain personal interactions... his work including How To Design Programs had such a positive impact on my life and the lives of others that I wouldn't discourage people from taking advantage of it.
All of the instructors, including Felleisen and Butterick, were nothing but helpful and friendly inside and outside of the classroom.
Even taking that link completely at face value that Felleisen is a Torvalds-type asshole in certain personal interactions... his work including How To Design Programs had such a positive impact on my life and the lives of others that I wouldn't discourage people from taking advantage of it.