why would it, though? Qemu (probably) works on "M" macs. Virtualbox is linked intimately with the underlying hardware, it's a translation layer - even though it can do emulation, it's x86 emulating x86.

i always thought i was one of the few people that used virtualbox instead of the more popular ones; i tend to forget that there's probably a subset of developers that still use it for the orchestration software that can use it.