So the colloquial patterns of use are pretty deeply dependent on understanding the rest of English, so you can notice where it becomes ambiguous or starts to feel like they could almost be different sentences but the person who is communicating with you is ignoring that because their personal dialect doesn't have those pauses and you kinda just have to deal with that when it happens.
Every other rule-set I've heard has to be accompanied by so many exceptions, and has so many competing schools that disagree, that they're just dogma, not description. And they're extremely hard to remember. So they're more about socially signaling that you're part of the well-educated upper-crust than they are about communication.
And yes, I'm an Oxford Comma user. It reduces ambiguity.
If you use commas only to denote when you’d pause when speaking, your writing can come off as juvenile or uneducated. It’s not just a signaling thing. It is jarring to read a sentence with them misplaced.
> The rule is that multiple adjectives are always ranked accordingly: opinion, size, age, shape, colour, origin, material, purpose. Unlike many laws of grammar or syntax, this one is virtually inviolable, even in informal speech. [0]
There is a proper order for adjectives in English that native speakers follow, but cannot explain.
> "It's an odd thing that every English speaker uses that list, but almost none of us could write it out. And as size comes before colour, green great dragons can't exist." [1]
0 - https://www.theguardian.com/commentisfree/2016/sep/13/senten...