What's your criteria for "solid"? Let me guess. Whatever shifting goal posts criteria confirms your preconceived biases that D&D is better suited for streaming than non-D&D games? Does that sound about right?Well, can you point to any solid non-D&D streams...? I'm not saying that it is the only game that streams well (Call of Crhulu does very well, actually),
On what basis? More of this "improvisational" nonsense perhaps? You seem to be eating that sort of self-congratulatory pat-on-the-back explanation up like candy.but D&D is very well suited to the format,
I have also seen D&D streams fall flat on air, which is little surprise given the large number of D&D streams. It's hardly unique in this regard. But I suppose it's easier for you to notice the D&D ones that succeed than the many others that fail.and I have seen a lot of other systems fall flat on air.