Workers

Workers changed how I build software. The isolate model means effectively zero cold starts, code runs in hundreds of cities without you thinking about regions, and the pricing is so aggressive it makes traditional serverless look like a rounding error generator. CPU-time billing (rather than wall-clock) means you stop paying for your dependencies’ network latency.

The developer experience has matured into genuinely excellent: wrangler is a good CLI, local development with workerd matches production behavior closely, and static asset hosting means a Worker is now a complete website primitive, not just an API layer.

A decade in, entire production platforms run on Workers — routing, APIs, websites, background processing. The platform limits that used to sting (CPU time, bundle size) have been raised repeatedly. It’s the rare product where enthusiasm only grows with scale. The caveats all live in the products around Workers, not Workers itself.