> Why does the Docker VM not emulate across architectures? Because it's easier to use a CPU emulator on just one kernel a single VM than manage multiple VMs.

> Why does the Docker VM not emulate across architectures? Because it's easier to use a CPU emulator on just one kernel a single VM than manage multiple VMs. So you can use QEMU just like Macs already use Rosetta for x86_64 macOS binaries on aarch64 macOS. Linux further has a built-in feature for running 'foreign' (different CPU architecture, but still Linux) binaries (and more!) in a transparent way, so if you set this up in the VM you can invoke those x86_64 binaries as if they were native, without really thinking about it: https://www.kernel.org/doc/html/latest/admin-guide/binfmt-misc.html https://www.kernel.org/doc/html/latest/admin-guide/binfmt-mi... You can also use it with DOS and Windows binaries, or via Apple's Rosetta for Linux instead of QEMU for CPU emulation (and there are some other open-source competitors in that space as well). Pretty neat!