Backers only I’m afraid. Also, while the tool is fascinating to the use, it is very complex and even internally not very well documented. To get it into a position where we would feel anyone could pick up and play with it would take a lot of effort.
Plus the actual time to build whole worlds is quite long, even on one of the new 4900HS ryzens i was getting 10+ minutes to build a world, on a more “standard” quad-core i5 i have seen 40min exo worlds being built. I’m not sure it is mass market ready 
When we build worlds on the server it is a lot faster.