I don't think Biggie wrote every word of Hardcore. Yeah, he definitely helped her and that's obvious. Still, there's a lot on Hardcore that isn't Biggie and it has nothing to do with the content and what not, it's just certain rhymes on that album that aren't Biggie. She came into her own on that album because she sounded different than she did on some of the Junior Mafia songs. Listening to the demos of some of the Junior Mafia songs that never got released, Kim sounded exactly like Biggie. Her voice was way deeper.
I don't think his post had to do with the threads. Some albums get these anniversary pieces written or documentaries made about them. Its not all albums that get that treatment. The Booth runs anniversary threads into the ground because they do it yearly for any album. I'm talking anniversary pieces that celebrate 10, 15, 20, 25 year milestones that analyze the impact and influence of a work within that time frame.