Pioli was Milans manager, not Inters, Inters manager is Inzaghi (loved him when he was a player too) and he is staying until next summer at least, probably will stay even longer if they win the league again. I think it is quite obvious that Milan didn't do as well as expected and that is why they fired Pioli, Mourinho has been fired for a long time and De Rossi has done quite alright so far, same with Lazio because Sarri didn't do anything good, Lazio sucked all season long.

I feel like it is quite obvious that we are going to see some changes one way or another, and could not really consider that as a bad thing, we need to consider that as normal and not really approach it as something wild, it is very normal to do this. Teams fire managers when they do badly.