First of all I don't believe in coincidence. Every action is just a reaction and a coincidence is an excuse when you don't know what's behind the action. But as CapeOne just said, it's seems pretty clear why he did it and when. I just don't believe it was one of his smartest moves.
But with an open mind I might assume there is a new Model S on the horizon and he has existing MS in inventory to unload before announcing the new look and features at a higher price. I'm not talking about Plaid as we know about that. I'm talking about an LR+ with all new interior and added tech features plus the new battery cells currently in the Model Y but 120KW size for 500+ miles range and 250KW charging. The latest monolith battery is not ready yet. OK I can dream.