React SPAs Disappear From Google: Why Older Frontend Choices Cost Search Traffic

Older React SPA marketing websites are disappearing from Google search results despite Google's ability to read JavaScript, directly costing companies organic customer acquisition. The root causes—missing H1 tags, soft-404 responses, poor structured data—stem from frontend architecture decisions made 5-8 years ago that are surprisingly easy to fix. This silent SEO crisis represents a critical warning for engineering teams whose past technology choices now threaten current business metrics.