[lolrustards]

Even Lisp programmers decide to pragmatically use an OOP model when doing GUIs.

The idea of using FP for everything is about as sensible as the paradigm of using OOP for everything.

[Capricorn2481]

You say that like CL programmers are inherently functional, which has never been true. They have always embraced OOP when needed

[kazinator]

Less, I would say; because using OOP for everything is straightforward, just obtuse, verbose and possibly slow.

You don't have to solve paper-worthy academic puzzles to use OOP everywhere.

Using OOP everywhere has been done and probably continues to in some shops. There was a time in the 1990's when nobody was fired for using OOP everywhere.

In Common Lisp, absolutely every value you can create has a class: the class-of function is meaningful for any value. You can replace all the defun forms in a Common Lisp program with defgeneric and defmethod.