Kingpin has never been nerfed.I barely know about comics, but this was when the Kinpin was nerfed or it has still a body full of muscles?
Not in the anime, I don't know about the manga.Did they ever address the whole 'is he still in the game or are these real people in another dimension' question?
I was actually thinking of the special circumstances drone revealing himself in Player of Games. I love how the Culture series frequently does this act of "we could have killed everyone ages ago but we were trying to be polite about it to make a point.""That's sums up The Culture very well.
There's a reason people in the Culture universe say the following:
"Don't fuck with The Culture."
The decimation of an entire war fleet by a single Culture Abominator class war ship called the Falling Outside the Normal Moral Constraints is one great example, from the book Surface Detail.
Or a rogue faction in Look to Windward been decimated by something known as E-Dust another.
There are many such examples from The Culture series by Iain M. Banks.