Just because something's old doesn't mean it's not relevant, yes might not've been the best language to suggest - the more modern BQN, Uiua and Singeli exist too - but it's still a fairly niche paradigm. Ideas tend to come in cycles too - look at the 1980s ideas of the transputer or connection machine.

I wanted to point towards a programming paradigm that's approach enables you to take advantage of the parallel execution possible within chips today due to the notation being both precise in intent yet vague in execution. Take summing an array (`+/vector`) or selecting values given a boolean mask (`mask/values`) - both these very simple expressions are expressible directly in SIMD instructions, as there's no for loop index enforcing an order.