What is the downside of Express being unopinionated?
You make many choices yourself (validation, auth, structure). This is a pro for flexibility and a con for consistency across teams. For large teams, an opinionated framework like NestJS may fit better.
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More FAQs in Express vs Other Node.js Frameworks: When to Use What
Express for flexibility and ecosystem. Fastify for speed and built-in validation. Koa for cleaner async. NestJS for large teams that want conventions. Pick based on what your project and team need.
It is minimal, flexible, has a huge ecosystem, is documented everywhere, and is easy to hire for. It scales from small to large projects and gives you full control over architecture.
When performance is critical, you want built-in schema validation, and you are OK with a smaller ecosystem than Express. Fastify is significantly faster and has good DX.
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