Racket is, as far as I understand, a research and teaching language, as well as a viable scheme.
I've used it for some [command line tools and side projects][1], but I never tried to deploy anything with it.
Maybe a new [Chez][2]-based (as Racket now is) scheme is needed: one with much of Racket's nice syntax system, but focused on dependency management, targeted solely at "production" use, and other Serious Business Purposes.
Not it!
I'm not saying that Racket isn't a serious platform -- far from it. But the author's concerns, while expressed as a hot take, might be why Racket doesn't see wider industry adoption.
Or maybe it's a chicken and egg problem.
[1]: https://github.com/dgoffredo?tab=repositories&q=&type=&langu...