Dyna Robotics DYNA-2 challenges VLA paradigm with world-action scaling

DYNA-2, trained on 1M hours of pure human video, claims a scaling law with 1.55× quality pass rate over VLA, 87% zero-shot deployment, and 13-minute fine-tuning. Confirmed results show up to 90% task success and cross-hardware transfer. This directly challenges the VLA paradigm and reinforces the world model trend.