This merge - https://opendev.org/openstack/neutron/commit/a6fb2faaa5d46656db9085ad6bcfc65ded807871 - to the Neutron stable/rocky branch on April 23rd, has broken my team's Neutron plugin, by requiring 3rd party LinuxInterfaceDriver subclasses to take a new 'link_up' argument in their 'plug_new' method.

IMO, it should have been obvious to folk proposing or reviewing this, that it would cause breakage.

Does Neutron have a different understanding of "stable" than I do?  Or do plugins other than OVN not matter anymore?