Messaging and vtables are not at all the same thing. See my other comment here for an explanation of the messaging part.
Vtables by themselves fall just on the other side of the "is it still a message" divide. You can obviously optimize a messaging system further with vtables and enrich a vtable-based system so that it has enough information to be considered "messaging", but out of the box that's where the divide is.
Vtables by themselves fall just on the other side of the "is it still a message" divide. You can obviously optimize a messaging system further with vtables and enrich a vtable-based system so that it has enough information to be considered "messaging", but out of the box that's where the divide is.