‘Tis the Season for COSMIC Alpha 4! (System76 Blog)

System76 has announced the
fourth alpha release of its Rust-based COSMIC desktop. New features
in this version include the ability to set default applications,
region and language settings, a new Accessibility applet, as well as
support for
variable refresh rate (VRR) in the cosmic-comp compositor and the
display settings tool. See the blog post for a full list of fixes and
performance improvements. LWN covered the first alpha
release in August.