MATLAB, NumPy, and a lot of GPU programming (not to mention, Julia) relate to APL and J. You might be surprised by how important what you're learning is to express an efficient computation on a GPU in terms of array operations.
Yeah, I know NumPy, but what I really enjoy about APL/J that you can only get from those languages is "notation as a tool of thought", something is lost in high level expressive languages.