I had stumbled upon John's work before.
I am currently dabbling with a stack-based audio language called Sporth [1], and messing with the idea of somehow mashing it up with John's ike project.
See, vector/array languages aren't just for FinTech or Time Series!
https://github.com/JohnEarnest/ok/tree/gh-pages/ike
https://github.com/JohnEarnest/ok
And related APL/J/K subreddit: https://www.reddit.com/r/apljk/