there is good reason for this though. Mixing different generations of cpu's makes it very hard to allow live migrations/failover of certain workloads if they d

there is good reason for this though. Mixing different generations of cpu's makes it very hard to allow live migrations/failover of certain workloads if they depend on instructions or features that are present in some CPU generations and not in others. this gets even more confusing if you look at the product segmentation intel does on it's cpu's. Newer CPU's might not support all features older cpu's do for instance.