I had a long ranting comment I deleted. I just don't like this trend of people presenting work in a way that makes you think some combo of 1) they discovered from scratch themselves 2) it's new 3) they didn't try to cite or acknowledge where they learned it/point to good sources 4) they don't really care about trying to teach something deeply, they want shiny stuff that makes them seem deep.
This post references specific parts/calculations, but you'd never know it was not news if you didn't know better.
This post references specific parts/calculations, but you'd never know it was not news if you didn't know better.