The practical use is that it's a programming language for purists or Luddites. You know, the kind of people that like suckless tools, Plan 9, C89, maybe Forth, or even R4RS Scheme. Maybe hate on the latest C++ standard or systemd. Programming is social, and these people need their safe spaces too.
Will they pull it off? Languages need killer apps more than they need language features. So there's both a chance and work to do. Let's see.
For me, you know, I feel like this industry is soulless and dull enough; I don't need a boring programming language to top it off. If all I'm doing is helping someone get even richer, at least let me have some fun while doing so.