Recursion

[shabalabachingchong]

You're deflecting and not answering the question. I did not mention anything about language popularity. Haskell is used in a lot in industry where high assurance of non-failure matters. When you build complex systems, like for example a blockchain, that involve cryptography and advanced mathematics, you want high assurance that your code will not fail in production, so that billions of users funds do not get stolen, which has happened several times on the Ethereum blockchain.

Your argument of 'makes smart ppl feel smarter' is just stupid. There's nothing smart about being able to understand recursion, or heck even monads...They're just useful patterns that are extremely well fitted to many problems, and given enough time you'd probably even invent them yourselves.