Alexander Kolesnikov 2026 04 14 Matthew Berman 28 June 2025 deepseek R2 development stalled due to performance dissatisfaction and nvidia H20 chip shortages resulting from us-export-controls. Source Notes 2026-04-23: Engine Survival: The Critical Role of Oil Pressure and Warning Lights 2026-04-14: I Looked At Amazon After They Fired 16,000 Engineers. Their AI Broke Everything.