We are going to talk about the benefits of using Optimistic UI from the perspective of UX and Usability. Once the value is established, we check what are the important caveats to be aware of, and most importantly when to use it. Moving on to more practical examples, we check the concepts behind the related Remix APIs (loader function, action function, useLoaderData , useActionData, useTransition, useFetcher), and finally: some live-coding to illustrate what we have all discussed - we create a DB table on stage so we can query and mutate data.