There are languages that are purposely designed to be bizarre. So IMHO functional programming is not exactly declarative programming, but indeed functional languages are more declarative than procedural ones. OCaml unifies functional, imperative, and object-oriented programming under an ML-like type system. Anyway, most functional languages can also make use of OOP, yet they are not really based on objects as JAVA where everything is an … God I hate the term "code smell", but I can't think of anything more accurate. I agree that Functional Languages are very useful, and yet, considered overrated. I consider many developers that consider themselves as "Object Oriented" (included myself), more like "multiparadigm oriented". Often times the less known the language the louder the zealots. I'm designing a high-level language & compiler to Whitespace in my spare time to learn about compiler construction, language design, and functional programming (compiler is being written in Haskell).. During the code generation phase of the compiler, I have to maintain "state"-ish data as I traverse the syntax tree. This is the second part in a series I’m writing about lessons that can be learned from functional programming. Anyway, functional programming is overrated - its just procedural programming with a different style. The most commonly-used languages in use today are designed around the idea of OOP. Thus, programmers need not be highly familiar with the pure functional language paradigm to use OCaml. The most commonly used languages in use today are designed around the idea of OOP. Object Oriented Programming (OOP) as an idea has been oversold. A few days ago I had a conversation with some friends of mine about software architecture and to be honest, I’m not a huge fan of this area. Unless you compare C++ and Object Pascal developers with Java and C# developers, and you see the difference. Software Architecture is an important topic, but it’s overrated. In general, this is an overrated topic of the software industry. Find the first part here. Functional programming makes use of loose variables. "Functional Programming is Overrated" "Lambdas leading to unreadable code" 20 years later: "Function programming sucks" "Functional Programming is Overused by web developers let's stop it" "Functional programming considered harmful" "Functional programming considered harmful considered harmful" Hopefully we won't be reading that on Medium. That said, "purity" in FP is a totally overrated concept IMHO. Also, declarative systems are not overrated, but you need some dozen of years to develop them (read the mythical man month) As John points out, every single language has its zealots. Object-oriented programming (OOP) as an idea has been oversold. A Bit of Heresy: Functional Languages Are Overrated (2010) (benrady.com) ... 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