Where does this really fail? The single point of failure lies in the abstraction of a test bench limited to 250 S&P 500 assets to validate large-scale portfolio optimization. This failure mode ignores the operational complexity of real portfolios, which manage thousands of often illiquid instruments. A concrete example: how could such a static test evaluate the liquidity management for emerging market corporate bonds, subject to fluctuating geopolitical risks? The blast radius of such simplification underestimates the regulatory constraints and the capital preservation mandates of our funds. We need to stress-test these approaches on universes that faithfully reflect our transactional requirements and risk tolerance.