Hello,

As agreed during the latest IRC meeting, Kolla Yoga and Zed deliverables (Kolla, Kolla-Ansible, Kayobe) are going EOL. [1]
Antelope remains as unmaintained, while Bobcat, Caracal and Dalmatian are our current stable releases.

Yoga and Zed branches were unmaintained for a while, Kolla community does not have resources
to support those branches actively.
All changes to those branches have been abandoned.

[1] https://review.opendev.org/c/openstack/releases/+/937101