I have to say I was blown away by this on P3D but Conti clocked in at 40GB of RAM used. I wonder how much RAM it will require on MFS? I would wager much less but perhaps I am wrong. We may well be entering the 64GB epoch with these planes.
I still have not purchased any Airbus but I would love to get my hands on the 350-900 
A350-900 | A350 | Aircraft | Airbus Aircraft
Just as long as they keep the DRM and malware out … and it runs well of course!