A multi platform open source game framework that easy to compile from the source is hard to die IMHO, even if it dies some genius will pick it up and continue the development.
I think the main advantage of MG is that i’ts a framework and not heavily attached to an editor and it’s very code centric.
Theres a newly open source game engine with a very cool editor just like Unity and they just open the source recently and the community is asking how to use the engine without the editor; I find it ironic : - D X