Thanks zazang for this link. This was a very good and true statement there:

"As an Indie developer, I have limited resources, and most importantly, limited time. The clean, well thought out design of C4, and amazing support from Eric and the C4 community in general, means that our team can focus our time on building our game."

I would like to add that the good tools (model, texture, level and material-editors all previewing in real-time) are contributing to this idea to save time while working on your game.