One of the things I like about Racket is that it has a cross platform GUI built on GTK in the standard library[1]. It also has a GUI builder app (though I’ve never used it so can’t say how good it is)[2]
My most recent example is a prime sieve I wrote in Racket which was at least 10% faster than the Python implementation (can’t remember the exact number right now) I modeled it after, and then another 10% faster than that when I converted it to typed-racket[1]
For interactive development it’s true Racket isn’t as heavy into top level development as other lisps, but I often run my code and then play around with modifications to it in the repo afterwards using racket-mode in Emacs.
1. https://docs.racket-lang.org/gui/
2. https://github.com/Metaxal/MrEd-Designer