I use Racket almost daily, but as a tool to helping me do my job (mainly PHP, yerk...).
Racket is so flexible and batteries included I can write small tools/scripts to summary DB data, sort files, filter git changed files and many other small things.
I am currently incorporating more Racket in my workflow for automations and I am preparing reports about the speed benefits for my tasks (comparing with and without tools).
I hope to get good results to show the upper up next year.
I also try to "advocate" Racket to my co-workers that "it can help you get better and faster" by showing some snippets when pair programming.