Godot, Doom, and Blender are all great but none have the level of approachability that Hypercard and Flash had for the amateur. They allow determined creators to soar, but they aren't enabling people who would not otherwise be creative to make interactive media in the same way. The 2d/3d gulf is a huge one to cross, and that may be the main issue. There was also something very wyswyg about both flash and hypercard-though Godot definitely approaches that. It's just hitting it's stride popularity-wise, so I guess where people take it remains to be seen.