I discovered APL/APL2 in the 70's (using actual overstrikes on a paper terminal) and fell instantly in love with it. But when I later discovered functional pro

I discovered APL/APL2 in the 70's (using actual overstrikes on a paper terminal) and fell instantly in love with it. But when I later discovered functional programming with ML and Haskell, I realized that what I really enjoy about APL had little to do with arrays, but more with its ability to compose functions. Haskell is so much better at this, being completely pure and typed throughout, and is even more fun and powerful than APL; I've used it to write a lot of small and medium-sized projects, prototype LLVM Flang's parser to prove the concept of using parser combinators for Fortran, and do Advent of Code each year in a few hundred lines of code total. If you like APL, try Haskell. Today, I think that the whole "notation as a tool of thought" aspect of APL is a rationalization for excessive brevity -- which can be a good way to demonstrate the power of composition, but which can work against clarity.