Default Desktop Environment
What desktop environment each Linux distribution ships by default.
Ubuntu
Ships GNOME (with Canonical’s own customizations and extensions) as the default desktop, though official “flavors” offer KDE Plasma, Xfce, and others.
Debian
Ships GNOME by default on its live/desktop images, but as with everything else in Debian, the installer lets you pick KDE Plasma, Xfce, LXQt, or others just as easily.
Fedora
Ships GNOME by default in its flagship Workstation edition, presented close to the upstream GNOME experience, with official spins offering KDE Plasma and other desktops.
Arch Linux
Ships no desktop environment at all by default — the base install is a command-line system, and users install and configure whichever desktop (or none) they want themselves.
openSUSE
Ships KDE Plasma as its most prominent default option, though GNOME is offered as an equally well-supported alternative during installation.
Linux Mint
Ships Cinnamon, its own actively developed desktop environment forked from GNOME 3, designed to feel traditional and familiar rather than following GNOME’s more modern shell paradigm.
Alpine Linux
Ships no desktop environment by default — it’s primarily used headless, in containers, or on minimal systems, with a desktop environment only added manually if needed.
NixOS
Ships no desktop environment unless explicitly configured, but supports GNOME, KDE Plasma, and most other major desktops as declarative options in its configuration file.