You didn't mention one of the important things about virtual bases classes in that the most derived class must explicitly call the virtual base constructor (something that non-virtual inheritance doesn't allow — assuming the base class has and you want to call a non-default constructor).
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You didn't mention one of the important things about virtual bases classes in that the most derived class must explicitly call the virtual base constructor (something that non-virtual inheritance doesn't allow — assuming the base class has and you want to call a non-default constructor).