The JavaScript Framework Effect: Rendering Strategy and Era Predict Website Quality, Not Brand
We cross-referenced 15+ JavaScript frameworks, static-site generators, and CMS platforms against SEO, AEO, EEAT, WCAG accessibility, readability, and privacy grades across LLMSE's 3.4M-URL index. At full scale the 'React paradox' collapses: React is mid-pack on SEO (2.1%) and below average on accessibility (32.4%), not the outlier the first small sample suggested. What holds: rendering strategy and platform era predict discoverability — static-site generators and Ghost lead SEO, modern pre-rendered output beats client-only SPAs roughly 2-to-1, and the 299,000-site jQuery-era web trails almost everywhere.