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 is excellent. Wrangler is a good CLI, local development with workerd closely matches production, and static asset hosting lets a Worker serve a complete website rather than only an API.

A decade in, entire production platforms run on Workers: routing, APIs, websites, and background jobs. Limits on CPU time and bundle size have risen repeatedly. My enthusiasm has grown with scale. The caveats belong to products around Workers, not Workers itself.