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I did and even though I'm forever in love with both Rebol and Red, Racket does languages in a more fun way and powerful way for my own personal taste. Don't know if you have checked this book out but https://beautifulracket.com/ is a wonderful introduction for building languages with Racket.

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For me, the power of the Redbol approach lies in the rich set of datatypes, so you can create dialects at the block/value level, leveraging the syntax without having to tokenize at the string level. It's no small thing to be able to create languages that natively understand values like email addresses, URLs, IP addresses, files as distinct from strings, and more.

From brief check on the book I see that Racket has a lot of infrastructure for making languages, but fundamentally I don't see the difference with Parse in Red. One can easily add tokenizer, reader and expander similar to what is there in Racket.

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