Thank you for the discussion. I am now convinced but unfortunately, I cannot confidently say that I deeply understand.

I've taken a shot at the linked paper but will require more readings to fully grasp what it's saying. However, between what I understood of the paper and the example that you provided, it makes sense that J would be considered an abomination of APL.

Hopefully, after reading the paper a few more times and maybe even trying out APL, I'll have a better understanding. Thanks again for your time.