I (rme) was invited to give a talk at this year’s European Lisp Symposium in Marbella, Spain. It was a great conference. I highly recommend that you try to attend next the next one if you possibly can. It will be in Genoa, Italy. See https://european-lisp-symposium.org.
Anyway, I prepared a web site that contains a video of the talk and also a written transcript with slides included in the text in the appropriate places.
The link is http://thisoldlisp.com/talks/els-2018/
It’s not really very technical in nature (it’s meant to be entertaining and encouraging), but maybe some of you would enjoy it.