Thanks Sivan.

Who said it was Unity ?
Yes i'm learning some C# tutorials, i can avoid Pro with clever level design and graphic orientation (and there is some free shadow plugin for free version).
I use it for some personnal retro PC game and with team projects but not as programmer indeed, just to make some level design and terrain sculpt and test 3D models i make (so no need for Pro in that case).
And i use another promising indie one.
Incoming Shiva 2 is also a promising one, seeing the low price, and all platforms supported it would just be awesome also, we'll see when it will be available.
I think 3DGS to stay programmers way(Lit C is derivated from C, not so easy, initialisatiosn are a pain aslo), i don't think it will go as far as Shiva 2 or Unity in terms of mobile or features ?

Well if 3DGS make some 180 turn with new language or C# full support, totally new workflow and editor, and very low price, yes perhaps some of us will come back.