Given 3DGS has been a BSP engine for most of its existence I think moving it to Pro is a bit questionable. Some of us have built our long term projects around BSP, and essentially forcing a Pro upgrade to continue on this path isn't right in my mind. However, if ABT is beneficial for indoor levels then it's basically a null point.

My User Contributions master list - my initial post links are down but scroll down page to find list to active links