[Ygg2]

> Then you might say that Rust is an expressive programming language.

That's not what I mean. Expressivity allows you to objectively test if two languages are different. The functional/objective/imperative are trying to capture some expressive features.

Using expressivity, you can finally put a Turing machine to that feeling and test it.

> The terminology there already exists and is commonplace, as far as I see.

Missing the point. Message oriented language captures the expressivity of having the ability to send and receive arbitrary methods. This is what I mean.

If OOP or MOP is just a marketing term, then it carries no value.