Rebol had both (and more) decades ago, so it does seem odd to me Red doesn't given how much of it was inspired by that. IIRC its original concept was "open-source rebol".
It's original concept was not just "open source" (no hyphen required, nor is it "opensource" :), but to be a much better Rebol than Rebol - which itself was a neat concept and implementation by Carl Sassenrath, also creator of the Amiga OS.
I had used Rebol for writing small programs a while ago, and it was fun. The Rebol software was also very light, at under 1 MB, IIRC, for both the Windows and Linux versions.
