GM spent $10 billion trying to build a robotaxi brain, then shut Cruise down. Nvidia just posted one to Hugging Face, free for commercial use. The economics of the giveaway are the real story. Automotive is Nvidia's smallest segment, $604 million last quarter against $62.3 billion in data center. A free frontier model looks like charity from a company printing those numbers. Follow where the compute goes. Alpamayo 2 Super is a 32-billion-parameter reasoning model built to live in the cloud,…