It's by design, many features of EC2 are unrelated to the chip itself. For example burstable scheduling, availability of enclaves, IO and networking bandwidth a

It's by design, many features of EC2 are unrelated to the chip itself. For example burstable scheduling, availability of enclaves, IO and networking bandwidth and a variety hypervisor features are all tied to the instance family. These are often far more important to a buildout than the exact chip you're running on