Thanks! We use node on the backend, and have our own realtime database engine that supports relational data, and out-of-order undo. We also have a custom fronte

Thanks! We use node on the backend, and have our own realtime database engine that supports relational data, and out-of-order undo. We also have a custom frontend framework that consumes the realtime changes pushed from all other clients. See more in my other comment: https://news.ycombinator.com/item?id=8374468 https://news.ycombinator.com/item?id=8374468