> What is the priority of app router integration for NextJS?

I'm not Jarred, but what do you mean by this? I'm using bun + app router + NextJS and everything seems to work just fine.

Not OP, but interested: can you deploy on a vps having only bun and not node?

Yes

I don't think you're talking about what GP comment is.

For clarification, Bun can act as a package manager like npm (probably the case of "bun + app router + NextJS" comment), and it can act as a replacement to a node runtime a la Express on a VPS (I'm assuming this is what you mean by "yes"). But Bun currently does not implement enough of the Node API's to use Bun as the runtime for a Next.js app.

From Bun themselves: "The Next.js App Router currently relies on Node.js APIs that Bun does not yet implement. The guide below uses Bun to initialize a project and install dependencies, but it uses Node.js to run the dev server."

https://bun.sh/guides/ecosystem/nextjs

On https://bun.sh/guides/nextjs it says that bun currently does not implement the API to run the dev server.

After Windows support is further along, but not that long from now