In my opinion REBOL was a great idea, and I also wrote quite a few extremely terse but readable inhouse apps before REBOL v2 development completely halted, and a useable v3 never materialized. As proprietary payware, it didn't really stand a chance.

I hope Red turns out better, but they're a bit late to the party, and need a lot more hands to evolve. Since I'm not in a position to help, I'll stick with Go + fyne for whatever can't be a web app.