All of the Vercel platform features you can use in Next.js (or other frameworks) are also available through the Build Output API for frameworks to target. This is what frameworks like SvelteKit, Nuxt, Solid, etc use on Vercel.
If you don't want to deal with any of that but like MDX (think Markdown with the option of JavaScript), I believe motif.land publishes your MDX sites with Vercel.
