I don't have any experience with doing a major version upgrade using it, but most people use Update Manager to update their ESX hosts and nothing else. In testing, updating Windows boxes worked, but ...

Virtualization giant VMware Inc. has made a new update to its vSphere 6.5 platform generally available. VSphere is the company’s flagship platform for implementing and managing virtual machine ...

If you haven't given a good look at the VMware vCenter Server Appliance (vCSA) since version 5.5, it's time to do so. The vCSA has a good use case and increased scale compared to previous editions.