Hmm I've always felt the true nature of FP is having higher order functions. That's what starts to make things fun. If you need a long keyword to introduce a la

Hmm I've always felt the true nature of FP is having higher order functions. That's what starts to make things fun. If you need a long keyword to introduce a lambda, or if partially applying and passing functions around is ugly then you lose a lot of the benefits and cannot truly embrace HOFs. In a typed language, no generics or other type limitations puts a major cramp on this too. Yeah this means C function pointers allow some FP. Except they're clunky and have a hard time bundling info with them (no closures). This makes HOFs sort of a pain. Controlling state, or at least immutability, is just a generally good idea. Even in rather non-FP code I wish I had easy immutability.