Disclaimer: I work for AWS

I think Outpost is a great hybrid-ish solution for those companies with workloads in AWS that want to supplement that with on-premise workloads using the same APIs and tools they are already used to.

The use cases I see for Oxide are, like other have said, are for hyperscalers or hosting providers who want to have their own on-premise infrastructure that isn’t tied to another entity like AWS. Whether that’s because you have the in-house talent to manage it or for compliance reasons it’s required it does have a niche.