Unfortunately it probably never will for three reasons:
- X-Plane's time to create the structures you see is slow enough that editing the real world in real-time would be difficult. We try to load things on another thread while you fly to help smooth this.
- Our scenery creators do a lot of work to build the DSFs before you fly - minutes per DSF...again, from the time the raw data changes, a lot of computation happens.
- We're trying to keep our tool set open source, but the X-Plane rendering code is closed source, so it would have to be rewritten (a huge task), e.g. WED would need an alternate editing engine.
Still, we must all dream. :-) :-)