What is the OSR? Who is OSR?

This is a broad response to the replies that crop up every time someone wants to get into the OSR scene that I've seen over 7 years. And that is to point to specific bloggers and their opinions or the OSR Principia doc and the like. A few months ago I saw a response along the lines of: this is totally different from how we did it 30 years. And this is the scraped twitter thread I did with no