Never heard of it before, but I am a bit curious about it being homoiconic. I wonder how it comes into play in Red/Rebol world, a little more thorough. This page shows some examples of lisp-like 'apply: https://www.red-lang.org/. I wonder if the use of '[] is inspired by pre-modern lisp M-expressions (Mathematica is also using them), or is it for some other reason, like let's pretend we are not a lisp-like language so to not scare of folks? :) Square brackets and curly brackets are unfortunately harder to type on some layouts. On Swedish layout I have to press alt-gr to type those, while ordinary parenthesis are a bit simpler: I can use shift, which is found on both sides of the keyboard.

Perhaps such things sounds trivial, but in a language where they claim that programming should be fun, hard to type things are a bit of fun-killers. I also disslike both visually and if I would to type all those operators #,%,$,?,:,! etc. We humans are used to raede txet adn cna prase text even when mistyped without barely stopping, but the punctuation is a bit harder to read and type, and that for a reason. That becomes especially annoying if those signs are overloaded or combined, as in Perl or C++, which is probably one of the reasons that gives those languages "write-only" epithet.

I have seen the video: https://www.youtube.com/watch?v=-KqNO_sDqm4 by Nenad, but it is from 2015. If they are still 4x slower than C for the compiled code, than I am very hard to believe they are a serious contender to become a systems programming language as they claim to be. Compare to sbcl (Common Lisp) where speed is almost approaching C in some cases. Having built-in toolchains and DSLs is nice, but it can also be a curse and made things harder to evolve and modernize.

While I sound like a very negative person, I do like some of the ideas in Red definitely. Built-in tasks, concurrency and homoiconicity sounds like a very nice features to start with.