Next.js Image Optimization in 2026: `next/image` v4, AVIF by Default, and the Config Changes Teams Miss
Our take: Mid-tier framework release; breaking changes matter but incremental format switch.
Why Impact & Innovation? We ask two questions of every story: did this actually change something in the real world (Impact), and is the idea genuinely new (Innovation)? Together, that's the TS Score — not engagement, not who posted it, just what matters and what's new.
Next.js v4's default switch to AVIF format and breaking configuration changes cause production incidents when teams upgrade without understanding the new requirements.
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