[nightlyherb]

As a person who respects many programming paradigms including OOP and FP, I beg to disagree. Specifically, I'm assuming you're talking about OOP the paradigm, not only the dot notation, for which the pipe operator is a viable alternative.

> The modern OOP-derived style of `array.mean().round(digits=2)` is just as exact in its specification, and arguably more semantically precise as well as it organizes the meaningful bits to be together.

I would have agreed with you if I were developing business applications. However, for the domain of math and science, every piece of material that I have seen assumes the paradigm of numbers as immutable entities and functions, not the paradigm of mutable encapsulated objects and interacting messages. To a mathematician or scientist the semantics of a `Vector` (as data) and a `mean` function that takes the `Vector` as input should be more natural than a black-box `Vector` object that can receive a `mean` method.