The M1 machines won't run Intel based virtualization tools like VirtualBox, and cannot run Intel Linux as a VM. To run VMs for development work, one will have to run ARM VMs (anyone know of a Centos ARM image?), which is fine - as soon as there is a tool for doing that! (does anyone know of one?)

Also means that if one builds a VM image on one's M1 Mac, the image can only be used in ARM VMs - e.g., AWS A instances. Not too big a deal though.