I have used it for some toy hobby things. Every time I do, I come away wishing I could use it to replace R or Python for data science tasks such as data mungin

I have used it for some toy hobby things. Every time I do, I come away wishing I could use it to replace R or Python for data science tasks such as data munging or statistics. I've even had a pipe dream for a while to create cross-compatible R implementation in Racket--"arket."