This article reads like something from 2010. Other than Go, new languages no longer have null references and you don’t need a purely functional language to do so. I kept waiting for more examples for why we need FP but the article yada-yada-yada’d the rest

I think FP came and showed everyone how to design expressive types, how to define flatMap on more than arrays, and that’s it. It turns out you don’t need Haskell, you can incorporate those features in imperative languages like Rust and Swift.