1. SpaceX's valuation reaches $800 billion, surpassing major defense contractors. 2. The projected IPO could value SpaceX as high as $1.5 trillion. 3. BA faces competition from SpaceX, which disrupts traditional aerospace contracts. 4. Pillars of defense like BA are facing production and cost-related challenges. 5. SpaceX's dominance signals a potential shift in the aerospace industry hierarchy.