New E-Maxx vs Future Brushless E-Maxx

My Father in Law would like a new E-Maxx. From what I understand there is a future brushless in the near future. From what I am told it will have two individual VXL systems. My opinion is to get the normal E-Maxx and in the future put in a single brushless system. I have 12020/8XL, I just don't see the advantage of seperate systems. What's the forum's opinion? Thanks!