Azure Stack Hub could use some improvement when it comes to seamless support for disaster recovery scenarios or high availability regarding multi-regions (not including global Azure). With Azure Stack Hub, your expansion is limited. If you need to expand your infrastructure, you can't just expand the computing power or the storage capacity. You have to expand both since it is a hyper-converged solution. There are third-party solutions that would allow you to expand storage via iSCSI, but it involves setting configs on third-party systems too. The next release should have improved scalability in terms of having multiple stamps as part of the same region or having the capability to replicate workloads to multiple regions of Azure Stack Hub.