I'm not sure what the Stones chat is all about. He was always going to stick around once Garcia said he wasn't renewing. Is anyone even advocating that we sell him? Giving him another go this year is the smart and obvious thing to do.
That said, the idea of giving him another contract to protect our investment is actually absurd, we definitely, definitely should not do that. Even is he's the best centerback in the world this season there's no one outbidding us on contract terms next summer when he has a year left. There's no risk at all in letting him play on the current deal.
Lastly though, we still need to sign another centerback, even if it isn't Koulibaly. "Do we even have any scouts" is an overused trope on here, but really, we have 60 or 70 million to spend, and the only centerbacks in the world we can find worth pursuing is either a guy who plays for Napoli or a 27 year old with one season of top level experience and a 70m release clause? This is a year after the only one we could find was Harry Maguire. This is a crazy problem to have.