Today, we’re announcing that On-demand Builders are generally available as a production-ready feature you can use in all of your Netlify sites! On-demand Builders are serverless functions used to generate web content as needed that’s automatically cached on Netlify’s Edge CDN. They enable you to build pages for your site when a user visits them for the first time and then cache them at the edge for subsequent visits. As part of this release, we now support an optional time to live (TTL) that will force your builders to regenerate new content after expiry, fully supporting Next.js Incremental Static Regeneration (ISR). We’re excited to see more of you use On-demand Builders to reduce build times and improve performance.