In fact they created a new language, that is what other all in one tools not done before.
Most other company with good tool-set like real-time world editor, terrain editor, shader editor, etc. are come out less then a decade, at that time GS has thousands of users.
So I think if Conitec should trash the WED and MED to create something more competitive.
Otherwise we will see a cheaper GS in future and GS will survive