EndeavourOS is a rolling-release Linux distro based on Arch Linux. Although the project is relatively new, having started in 2019, it's the successor to an earlier Arch-based distro called Antergos, so it's not quite as immature as its youth might imply. It's a little more vanilla than Antergos was – for instance, it uses the Calamares cross-distro installer.
EndeavourOS hews more closely to its parent distro than, for example, Manjaro, which we looked at very recently. Unlike Manjaro, it doesn't have its own staging repositories or releases. It installs packages directly from the upstream Arch repositories, using the standard Arch package manager
pacman. It also bundles yay to easily fetch packages from the Arch User Repository, AUR. The
yay command takes the same switches as
pacman does, so if you wanted to install, say, Google Chrome, it's as simple as
yay -s google-chrome and a few seconds later, it's done.