Not Linux, but I still look forward to window managers and Neovim releases. The Cosmic desktop also looks promising, though I’m not using it until it has a scrolling window manager available for it.

The immutable and atomic movement in Linuxland is very exciting. Cloud native distro building with docker/podman in CI pipelines is just insane: Building+testing+deployment with ci/cd can now not only be done with some python package, but a whole distribution. Also Wayland, Pipewire, Flatpak and Btrfs are great stuff. Of course they don't get developed in one release cycle, but in recent years they made large leaps and became default on many distros.