Four concepts on one platform isn't that a hard job for the dev's? What if the system will crash because of knotting of the features of the platform? How can you will assist and cater such kind of problem in the system?, it is possible actually because of system overload and overly using of users in the same time.
Let us see if they will do it according to the exact date that they put in their whitepaper. Probably, it will become a difficult in part of the developers. But I know that they already assumed that they will get some mistakes in the future. Yet, I know that mistakes and failures are the first step to success. If they have determination to have a successful project, nothing to worry at all.