Upgrading to Next.js 13 does not require using the new App Router. You can continue using pages with new features that work in both directories, such as the updated Image component, Link component, Script component, and Font optimization.
<Image/> Component
Next.js 12 introduced new improvements to the Image Component with a temporary import: next/future/image. These improvements included less client-side JavaScript, easier ways to extend and style images, better accessibility, and native browser lazy loading.
In version 13, this new behavior is now the default for next/image.
There are two codemods to help you migrate to the new Image Component:
next-image-to-legacy-image codemod: Safely and automatically renames next/image imports to next/legacy/image. Existing components will maintain the same behavior.