I'm surprised that I haven't heard of this line of languages before.
The home page of Rebol, which it says it's derived from, seems to do a much better job at stating its purpose: http://rebol.com/
One of the reasons it's not so famous is that it's had various historical struggles, including being stuck at 32-bit for a long time IIRC (I'm hazy on the details and corrections welcome). I love it though.
I am really looking forward to learn more about this language when 1.0 comes out, especially because of its ambitious feature list [3] (programming across the low/high-level spectrum, etc.), Lisp influences and the Logo-like syntax inherited from Rebol.
- [1] https://www.red-lang.org/2022/07/the-road-to-10.html - [2] https://www.red-lang.org/p/roadmap_2.html - [3] https://github.com/red/red