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I am actually surprised by the absence of AMD support for a project born at AWS. AWS has been offering AMD Epyc ec2 instances for quite awhile[0].

Missing arm support is also suprising but less so, as arm market penetration is obviously lower than x64

AMD processors work fine with Firecracker, support is relatively recent though so they’re being conservative about calling it production ready.

the vast majority of EC2 is intel. It's not surprising that AMD support is coming after intel support