Indeed, we stand on the backs of giants. I greatly appreciate everything that's gone into the pursuit of 3D Sonic games, especially from games like Sonic Adventure 1 and Sonic Unleashed. Each of them is a step in the journey in that pursuit. Between these and the classic games and my unstable joints, these experiences have been training me nearly my whole life, and I owe a great deal to every Sonic game I've played. Yes, even '06. As for whether these kinds of physics would have been possible on older hardware, I can't quite say. I'm still waiting to perfect the design before I really test the CPU footprint. However, the mathematics of motion are very engine-agnostic.