How to Architect a Scalable SaaS with Next.js 15, Shadcn, Drizzle, and Stripe (2026 Guide)

The "Boilerplate Fatigue" Every time I started a new SaaS project, I found myself doing the exact same 40 hours of work: Setting up Next.js authentication (Auth.js/NextAuth). Wrestling with Stripe Webhooks. Configuring a database ORM. Building th...