From having watched him play a fair bit and more recently.
And to be clear, I wasn't saying we should definitely get him. Just that he has developed into important player for club and country and would command a decent fee.
He's currently 2nd in PL for combined blocks, clearances and interceptions and Brighton have better defensive record than us, so just seems like outdated opinions.
There's a reasonable argument that he's now a good defender who would be decent for us. There isn't an argument whatsoever though that we missed a trick by not letting him go at the time, not that I am saying you are the one saying that.