I think the most relevant D talk about games remains this one from last year DConf:
As for D it's quite tricky for me to try to explain why it never really picked up. It might be the fact that there is no major force behind them, it's obvious when looking at languages like Go and Rust with their big corporate image behind them.
I also think it is missing the "WoW factor".. things like compile time meta programming is way above the head of the average programmer. I remember spending a day trying to figure out how to do operator overloading and it wasn't pretty nor intuitive at all... I kept thinking: "what's the point of this if I can use C#?"
Rust and Go bring with them new programming concepts and approach that make you feel you are solving your problems in a more efficient way instead of writing C++ with some added sugar.