Comment 4 for bug 1390246

Anyone wanting to run Solum will have a fairly mature openstack story and it's unlikely they'd be using anything other than neutron. If you switch back to nova-network then it means at some point you'll need to redo the work to get neutron working again.

Certain large public cloud vendors are neutron based, so it would make sense to ensure that neutron support is a first class citizen, especially for the VM use case.