> Shell scripting languages are famously obtuse and underpowered, and we've thought about how to cleanly merge shell scripting with a real language. It's heartening to see an attempt at it.

I used tclsh for a while. IMO a shell language needs the "function arg1 arg2" function-application syntax to fit with the way programs are called. Fortunately that style seems to be getting more popular - Haskell does it and to a certain extent so does Scala.