Re: VirtualBox

>> 
> 
> For lack of available info, I naively tried booting the aarch64 disc1 
> ISO, which not surprisingly didn't work.  Not even sure if this is the 
> right approach, but it seems like the intuitive one the the average 
> VirtualBox user.  I think it would be ideal if the experience were the 
> same as for x86.

Just try UTM :)

Again, VirtualBox is a road to nowhere - it emulates x86 on aarch. Of 
course, performance will be terrible, as well as emulation quality. KVM 
just works, and if you need UI - UTM works pretty well for me, at least. 
And you will get near-native speed, as it is arm64 guest on arm64 host 
which uses native macOS virtualisation framework.