Why are still discussing Mbappe's departure? He has already joined Real Madrid and he is happy. PSG is also happy seemingly as they have started to perform better than ever. End of story! 
Now the important thing is what Real Madrid will do with Mbappe as of now. He started badly in a couple of games but later scored multiples goals in one game. Hopefully he will adapt fully without taking too much time.
If Ancelotti maintains the teamwork strong then no problem. With players such as Mbappe, Vini Jr., Bellingham and more they can surely go for a back-to-back CL trophy.
Now the important thing is what Real Madrid will do with Mbappe as of now. He started badly in a couple of games but later scored multiples goals in one game. Hopefully he will adapt fully without taking too much time.
If Ancelotti maintains the teamwork strong then no problem. With players such as Mbappe, Vini Jr., Bellingham and more they can surely go for a back-to-back CL trophy.