When comparing Chromium OS vs Kubuntu, the Slant community recommends Kubuntu for most people. In the question“What are the best Linux distributions for desktops?” Kubuntu is ranked 45th while Chromium OS is ranked 89th. The most important reason people chose Kubuntu is:
Unlike some abandoned, unfinished distros, Kubuntu is up to date and offers a fully functional desktop environment that targets workstation users.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Safe and requires little to no maintenant
Since you only have the browser, you cannot install applications (outside Chrome Apps which are decently protected by their limited API and the Chrome Web Store). This means no harmful virus, and also nearly no way you can screw your system. Everything will just work.
Pro Minimalistic interface
Chromium's system UI uses as little screen space as possible by combining apps and standard web pages into a minimal tab strip: While existing operating systems have web tabs and native applications in two separate strips, Chromium OS combines these, giving access to everything from one strip. The tab is the equivalent of a desktop application's title bar; the frame containing the tabs is a simple mechanism for managing sets of those applications and pages.
Pro Lightweight
Because Chromium OS is designed for users who spend most of their computer time on the Web, it is intended for use in computers with little local storage and fast boot-up times.
Pro Full featured desktop environment that is actively developed
Unlike some abandoned, unfinished distros, Kubuntu is up to date and offers a fully functional desktop environment that targets workstation users.
Pro Stable as hell
Super stable, never crashes.
Pro Good hardware recognition
Pro Everything is highly customizable
Pro It also has paid technical support available
Pro Comes preinstalled in several laptops and desktops
Comes preinstalled in several laptops and desktops. (Tuxedo, Slimbook, laptopWithLinux.com, Kubuntu Focus, Vant and other companies).
Pro An outstanding number of packages and PPAs, backports PPA
Pro Kubuntu Focus Suite provides highly tested, curated ecosystem for pros
Pro Very stable
Kubuntu is very stable, you can easily install the appropriate Nvidia drivers for your machines, and not have dependency problems whatsoever. KDE offers a great user experience, and Dolphin is a great file manager.
Pro Customizable
You can easily adjust the workspace to your needs.
Pro Light
Cons
Con Google
Possibly harms your privacy.
Con Made for developers
ChromiumOS is mainly made for development, so there exist no official install images and you have to build it from source or use third party images like Arnold's or the waterfall images.
Con No auto-upgrade (unlike Chrome OS)
Chrome OS auto-upgrade the system, but Chromium OS does not. It's possible that they're thinking about adding that feature from the design doc.
Con Often unstable
There have been several bugs reported. Some of these bugs are: shutting down randomly, refusing to boot, refusing to shut down, menus may act strange, icons may disappear, etc.