When I was a customer back in the day, one of my operational checklist items for deploying a vCenter Server was to configure the vCenter Server ID and ensure that it was unique from other vCenter Servers within my environment.
The vCenter Server ID is a value between 0-63 that is randomly generated by default, but it can updated by a user after the vCenter Server has been deployed.
Why should you care about the vCenter Server ID? vCenter Server uses this ID to generate Virtual Machine MAC Addresses and if two vCenter Servers have the same ID, it can potentially generate duplicate VM MAC Addresses as explained in this VMware KB 1024025.
With this background in mind, is having a unique vCenter Server ID still relavent and applicable today in 2022?