Из ленты Phoronix — кратко, чтобы не потерять.
Canonical today released Mir 2.27 as the latest version of this set of compositor libraries for easily building Wayland-based shells on Linux and fitting into the Ubuntu Linux paradigm…
Полный текст и контекст у первоисточника: https://www.phoronix.com/news/Mir-2.27-Released