Ubuntu 17.04 has been in development since October last year, during which it received one Alpha and one Beta milestones, but only for the opt-in flavors. Ubuntu itself will participate only in the upcoming Final Beta release, which is expected to land tomorrow if everything goes according to plan. However, the developer informs the Ubuntu community that the queue freeze will last from March 21 until the final release of Ubuntu 17.04 (Zesty Zapus) on April 13, 2017, which means that no major package updates will land in the repositories, exception making those that are approved a member of the release team.