Day 1 Keynote – Yuzhi Zheng
summary
Release notes claim hooks reach ~9,000 GitHub repos and simplify Relay code; server rendering adds streaming and lazy-loading to cut bytes; Selective Hydration ships at Facebook and prioritizes hover/focus regions so only interacted components hydrate first; Suspense coordinates image and data loading to avoid flicker and waterfalls; Concurrent Mode runs in an experimental channel, enabling interruption and scheduling so longer renders stay responsive.
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