I recently started using Bun and removed Node.js and npm from my setup because Bun feels remarkably fast. However, when I create projects with tools such as TanStack or Next.js, they still rely on packages like Vite, dotenv, and database drivers that are primarily designed around the Node ecosystem. Aside from projects such as Hono and Elysia, I haven't found many modern full-stack frameworks that take advantage of Bun-specific features. Why hasn't a larger Bun-native ecosystem developed yet, and what would it take for Bun-focused frameworks and libraries to become more common?
3 Answers
Framework authors generally follow users rather than runtimes. A faster runtime is appealing, but production libraries need long-term compatibility, predictable behavior, and a large user base. Supporting Bun-only features could mean maintaining a second dependency ecosystem, so many maintainers prefer targeting Node-compatible APIs and letting Bun act as a drop-in runtime.
Bun’s philosophy also seems to be that useful capabilities should be built into the runtime instead of provided by dozens of separate packages. That can reduce the need for Bun-specific libraries, but it also makes the ecosystem look smaller. Elysia is one notable example of a framework designed specifically for Bun, while Hono also works well with it.
The biggest reason is that developers and library maintainers already use Node. Bun needs to be more than just faster before teams will justify switching or maintaining separate implementations. Most projects can already run on Bun with little or no modification, so there isn’t much incentive to rewrite everything around Bun-specific APIs.
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