the main reason you cannot mix CPU architectures in VMware systems is because doing a vmotion with zero downtime is impossible without major performance hits.

the main reason you cannot mix CPU architectures in VMware systems is because doing a vmotion with zero downtime is impossible without major performance hits. having clusters with the same configuration is useful because it allows vcenter to migrate virtual machines to another hardware host without any downtime on the VM's part. you can read more about this here: https://blogs.vmware.com/vsphere/2019/07/the-vmotion-process-under-the-hood.html https://blogs.vmware.com/vsphere/2019/07/the-vmotion-process...