I wrote a developer-focused handbook on user onboarding patterns, metrics, and React implementation I've been working on user onboarding tooling for React apps and kept hitting the same problem: every onboarding guide out there targets product managers. None of them include code, none address bundle size, none talk about accessibility in the context of product tours. So I wrote a handbook aimed at developers. Some of the more interesting data points I found during research: \- The average SaaS activation rate is 36%, and only 12% of users rate their onboarding as "effective" \- Interactive onboarding flows show 50% higher activation vs static walkthroughs \- 72% of users abandon onboarding if it takes too many steps (5 is the sweet spot) \- The average onboarding checklist completion rate is 19.2% (median just 10.1%) \- Role-based segmentation drives 20% higher activation and 15% lower churn The article covers the six main onboarding patterns (product tours, tooltips, checklists, empty states, progressive…