One big thing 3DGS has going is that this is a very active community and that 3DGS has been around for a long time (I think just about as long as Torque or Ogre3D ?).
I think that GameStudio has been around longer than either of those engines. According to the GameStudio Wiki, the Ack engine became Conitec's property in 1995 and was then offered as GameStudio. So this means GameStudio has been out for 14 years now. That's a long time for a real-time 3D game engine!
I just wish GameStudio actually had 14 years worth of improvements and advances
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