I learned quite a bit reading this. I am just looking at RED, but I program in Lisp&#x2F;Scheme.
FEXPRS come to mind [1]. PicoLisp sort of has them, and I think Newlisp does too, but I don&#x27;t use Newlisp. I think this addresses some of the Lisp comparisons in a different light.<p><pre><code>  [1]  http:&#x2F;&#x2F;axisofeval.blogspot.co.id&#x2F;2011&#x2F;07&#x2F;meaning-of-forms.html</code></pre>