Very interesting! Thanks for the ref. I wrote about my own efforts along these lines, using Lisp lists is certainly a natural, logical starting point. There are a number of parallel systems in Scheme which I used in prior applications.

I fully agree sexpr syntax is both beautiful and efficient. The fly in the ointment is that doing anything substantial quickly becomes complex and requires dealing with a complex programming model to accomplish the task. That can be a daunting hurdle even for experienced users to surmount. It speaks to appeal of simplified interfaces, which may help but I'm pretty sure won't mitigate the problem altogether.

Of course every bit helps, having more tools can be a very good thing if we know how to apply the right tool for the task at hand.