@thatsmyjamstack @Netlify We talked a bit about using #serverless functions as a fallback to render pages on the fly in place of a 404.
A more detailed description of that and an example which uses this for user generated content on a pre-generated JAMstack site is over here 👇
https://css-tricks.com/static-first-pre-generated-jamstack-sites-with-serverless-rendering-as-a-fallback/