SSG in Next vocabulary (which I employ because Perseus claims to be a Next alternative) is prerendering a page at build-time, not necessarily the whole site. So

SSG in Next vocabulary (which I employ because Perseus claims to be a Next alternative) is prerendering a page at build-time, not necessarily the whole site. So Next will still allow client-side routing, with its hybrid approach. What you describe is an exported app, sometimed named SPA (the name is wrong but people get the point), MPA or static app.