Super Micro AI-server volume and rack-mix reinforcement loop, and the conditions that break it loop reinforcing AI capex demand hyperscaler + enterprise Order book record backlog conversion gate DCBBS modular rack direct-liquid-cooled Rack-scale volume enterprise mix shift trough recovered Gross margin off its trough recovery stalls component / tariff cost reversal Non-GAAP earnings lift Forward revenue guide FY27 underwritten credibility frays reinforcing feedback guide + margin re-drive demand