Lisp is often used to create domain-specific languages. - Lisp S-expressions are powerful because they represent both code and data. So data is code; code is d

Lisp is often used to create domain-specific languages. - Lisp S-expressions are powerful because they represent both code and data. So data is code; code is data: it is very simple to augment the language. - Lisp S-expression syntax conveniently mirrors the tree shape of Abstract Syntax Trees. F# also supports macros and meta-programming: futures (F# version of async/await) were added to existing versions of F#. No need for a new language runtime! If JS had that level of meta-programming, I wouldn't have to wait for pattern-matching support! And pipes!