sajty/ember — comment on commit 73e5736005e157f4c9ce6102d3a923b03480cf68
File:  line 0
By sajty:

So basically if it has a singleton class as a member, it may be owned and it may be not, because you can't be sure that the code is consistent.
For me as a developer its not helpful feature thought.

But if you prefer that way, I can revert it in OgreSetup. :)