Thank you for the history and background! It's great to get it from a first-party source. > Ultimately the MIT AI Lab circa 1993 was the source of the decision

Thank you for the history and background! It's great to get it from a first-party source. > Ultimately the MIT AI Lab circa 1993 was the source of the decisions to use lisp for both these commercial products. I suppose another example is iRobot, where there's a custom Lisp-like language used, at least in the earlier robots. My understanding is that it's not used as much anymore if at all. > ITA's use of Lisp was driven by our co-founder and Chief Scientist, Carl de Marcken. I chuckled at his website that states "I retired long ago and almost certainly do not find whatever commercial project you want help with interesting". > At INKY (my current startup) we use Python. By 2010, when I started the incubator that evolved into INKY, it was pretty clear that scaling a development team on a lisp stack was going to be really difficult. If you were to start it today, with the developments of languages like F#, Elixir, and Clojure, do you think you'd have a different decision or outcome? I'm just curious, as a hypothetical.