So what has changed since Tcl was rejected for use on the Mars Pathfinder because "interpretive language code is too difficult to test" - https://wiki.tcl-lang.

So what has changed since Tcl was rejected for use on the Mars Pathfinder because "interpretive language code is too difficult to test" - https://wiki.tcl-lang.org/page/Mars+Rover+Project https://wiki.tcl-lang.org/page/Mars+Rover+Project ?? As usual, this looks rather like Python making a big fuss about achieving something Tcl did long ago :-) See also https://wiki.tcl-lang.org/page/International+Space+Station https://wiki.tcl-lang.org/page/International+Space+Station .