* x86 kvm -> nested arm64 binfmt, is much much much faster than arm64 binfmt -> arm64 tcg vm , which is what currently happens if you try to build an arm64 disk image on x86
* x86 kvm -> nested arm64 binfmt, is much much much faster than arm64 binfmt -> arm64 tcg vm , which is what currently happens if you try to build an arm64 disk image on an x86 host