The guiding metaphor of classic style is seeing the world. The writer can see something that the reader has not yet noticed, and he orients the reader so she can see for herself. The purpose of writing is presentation, and its motive is disinterested truth. It succeeds when it aligns language with truth, the proof of success being clarity and simplicity. The truth can be known and is not the same as the language that reveals it; prose is a window onto the world. The writer knows the truth before putting it into words; he is not using the occasion of writing to sort out what he thinks. The writer and the reader are equals: The reader can recognize the truth when she sees it, as long as she is given an unobstructed view. And the process of directing the reader’s gaze takes the form of a conversation.
Most academic writing, in contrast, is a blend of two styles. The first is practical style, in which the writer’s goal is to satisfy a reader’s need for a particular kind of information, and the form of the communication falls into a fixed template, such as the five-paragraph student essay or the standardized structure of a scientific article. The second is a style that Thomas and Turner call self-conscious, relativistic, ironic, or postmodern, in which “the writer’s chief, if unstated, concern is to escape being convicted of philosophical naïveté about his own enterprise.”
Second the recommendation for Steven Pinker’s The Sense of Style. His own summary here: https://davidlabaree.com/2021/07/08/pinker-why-academics-stink-at-writing/