{"id":682,"slug":"nextjs-cwv-10pp-drop-fid-to-inp-transition","title":"Next.js suffered a 10 percentage-point CWV drop when FID was replaced by INP (March 2024) — \"modern stack\" is not synonymous with \"fast\"","kind":"reference","scope":"business","status":"current","audiences":["kevin","claude-code","candid-team"],"topics":["core-web-vitals","framework-choice","inp-optimization"],"reference_body":"**Claim:** Per the 2024 Web Almanac Performance chapter, Fig. 9.3: *\"Several technologies were significantly impacted, including a 19% drop for 1C-Bitrix, a 10% drop for Next.js (a React-based framework), and an 8% drop for Emotion (a CSS-in-JS tool).\"*\n\n**Confidence:** Verified.\n\n**Implication:** \"modern stack\" is not synonymous with \"fast.\" Client-side React without disciplined SSR/SSG is one of the few cohorts moving the wrong direction on Core Web Vitals.\n\n**For Candid:** when arguing for Astro over Next.js for marketing sites, this is the cleanest framework-level data point. Astro's 2023 Web Framework Performance Report had Astro as the only framework exceeding 50% CWV pass — see [[astro-vs-nextjs-40pct-faster-90pct-less-js]] (existing). Next.js sat *at the bottom of the pack* with ~1-in-4 pass rates.","rationale_body":null,"metadata":null,"links":{"outgoing":[{"slug":"inp-replaced-fid-march-2024","title":"INP officially replaced FID as a Core Web Vital on March 12, 2024","kind":"reference","scope":"business","link_type":"depends-on"},{"slug":"astro-vs-nextjs-40pct-faster-90pct-less-js","title":"Astro vs Next.js (eastondev benchmark, Dec 2025): ~40% faster, ~90% less JS for static content","kind":"reference","scope":"business","link_type":"relates-to"}],"incoming":[]},"created_at":"2026-05-22T21:24:18.401Z","updated_at":"2026-05-22T21:24:18.401Z"}