containers are cattle, VMs were pets. If one does not get the operational differences nor understands that these are completely two different usescases then probably should not work in IT industry
VMs can be cattle. Physical machines can be cattle. This is not tied to the runtime technology, but to how you design and manage your machines and applications.
What makes a given component – server, vm, container, whatever – is not the runtime, but how you deal with it when it gets seriously ill. Pets are taken to the vet or hospital to get treatment. Cattle are.. well, read the article I linked.