Ah thank you.I think this is the original source for the 6nm shrink. It was widely reported almost a year ago and generally accepted afaik. I haven't really seen anyone question the validity of it before you.
https://www.angstronomics.com/p/ps5-refresh-oberon-plus
I was thinking it was just tweets from the regular players and not an actual article like this. I was looking for a die change and the article covers it.