I'm well aware, but I'm not sure what the point here is.
The OP was complaining that the author of the page wants "stock android". On a production device, you can either have 1) the manufacturer's custom version of Androi, 2) a near-stock Android, or 3) your own custom version but with all the usual issue that brings. There is no secret fourth option. So I don't see what the OP's complaint is trying to achieve.