I don't think VLIW is incompatible with virtualisation. The amount of CPU state you need to load and save on context switches is a little higher than other architectures so it has a minor effect on the efficiency of virtualisation. But other than that there's no reason VLIW can't be virtualised.

Not that the Apollos actually had hardware support for virtualisation features such as nested page tables. These machines were from the days before virtualisation was popular. Only IBM mainframes had it back then AFAIK.