It’s more true than ever that large projects resemble compilers. The existing llvm Frankensteins and code generators are evidence that people don’t know how easy this kind of thing is in lisp. As a concrete example look at auto diff.

The other advantages are less true because dynamic languages are prolific and powerful. But also you never really grok JavaScript or Python until you study Lisp. It’s common to see what’s essentially C or Java written in python syntax.

And let’s be fair nobody in the 90s understood C++ including pg.