Two things I've noted about this.|
(1) Lisp's influence is in every language being used instead of Lisp for AI or any other kind of programming.
(2) Although some of these techniques are still kicking and screaming their way into more common usage, it is still very difficult and/or expensive to use them. It is a shame some of these AI techniques that are 10, 20, 30 years old are not more a part of the average programmer's toolkit.
I would summarize these two points by saying...
We still like bits more than lists.