Launching a web product is easier than keeping it healthy. The stack you pick on day one becomes the default constraint for hiring, SEO work, incident response, and feature speed for years.
Start with the product surfaces you must support. A marketing site with strong SEO needs different priorities than a logged-in application with complex permissions. Many companies need both. Treating them as one undifferentiated codebase often creates compromise architectures that serve neither well.
Favor frameworks with clear upgrade paths and an active ecosystem. Next.js and similar full-stack React frameworks earn their place when you need server rendering, metadata control, and a single deployment model. They are not mandatory for every product, but they reduce the number of moving parts when content, application UI, and APIs share a team.
Separate what must be fast to change from what must be stable. Design tokens, content models, and component APIs should be intentional. One-off page implementations can move quickly; shared primitives should move carefully.
Finally, measure what matters after launch: Core Web Vitals, error rates, and time-to-ship for a typical feature. A maintainable stack is one your team can operate calmly, not just the one that looked modern in a comparison table.