I agree, sometimes you just compound the cleverness too much. There's lots of software that could be written in J in about 150 characters that might take much

I agree, sometimes you just compound the cleverness too much. There's lots of software that could be written in J in about 150 characters that might take much more in other languages. But I can come back to a line of J and wonder, "what was I doing there?" for a long time. Similarly, I have to stay current in Haskell for it to continue making sense. If I put it down for a few months, I come back and have to re-learn a lot of concepts each time, especially to understand other people's libraries as they adopt the next cool thing.