20 years ago, perhaps. But <i>30</i> years ago, you could buy workstations that were programmed in Lisp all the way down to the metal:  <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Symbolics" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Symbolics</a>