Yes, the same guy that supported the effort to add generics to Java, a decade beforee Go came to be, talk about not getting language design history.

Stop excusing them, they were the first to acknolowdge being wrong in first place,

"They are likely the two most difficult parts of any design for parametric polymorphism. In retrospect, we were biased too much by experience with C++ without concepts and Java generics. We would have been well-served to spend more time with CLU and C++ concepts earlier."

-- https://go.googlesource.com/proposal/+/master/design/go2draf...