Should I migrate my Next.js directory to OpenNext, Vinext, or TanStack for Cloudflare?

I wouldn’t migrate the whole app yet. Keep Next.js on the existing VPS and put Cloudflare in front as a CDN. A single server can serve users in multiple countries, especially when mostly static directory pages are cached at the edge. Keep reviews, bookmarks, and other user actions as centralized database-backed requests. Add a country field to your data model rather than deploying a separate app for each country.

The newer runtimes can work, but the migration risk may not be worth it for this application. One developer moved a Next.js app to Vinext and Cloudflare with relatively little effort, but complex sites and features such as partial prerendering can still be troublesome. OpenNext may be a safer option, while TanStack could be considered if you’re already planning a larger rewrite.

Your current architecture may already be enough: one VPS, cached pages, and Cloudflare as the global layer. The directory content sounds ideal for ISR or long-lived edge caching, while user features can remain behind normal API endpoints. If you eventually move to Workers, pay close attention to authentication, session storage, database latency, and framework compatibility rather than focusing only on rendering speed.