Rewriting Our Frontend from Angular 17 to Vue 3.5: 40% Smaller Bundles

In Q3 2024, our 12-person frontend team replaced a 3-year-old, 142-route Angular 17 production app serving 2.4 million monthly active users with Vue 3.5, cutting total bundle size by 41.7%, reducing first-contentful-paint (FCP) by 58%, and eliminating 12,400 lines of framework boilerplate with zero customer-facing regressions. The rewrite paid for itself in 11 months via reduced CDN costs and 22% higher mobile conversion rates, proving that targeted framework rewrites can deliver measurable busi