Yes, agreed, my comment was more an observation about how we actually have an academy graduate who's made the leap, and the deafening silence around that. We're often portrayed as a graveyard for youth players, but Christensen is paving the way. As chiswickblue suggests, perhaps it's due to nationality?
We'd only sell if Hazard explicitly asked to leave. We never keep players around if they don't want to be here. Hazard doesn't seem to be the sort to agitate for a move so it would probably take a huge bid to come in for him to ask for a move. As for replacing him, that's impossible of course, but I'd immediately throw over a 100m at Dybala. He's quality in his own right.