Recs.
Updated
Plasma Desktop offers a familiar working environment with all the tools and features required to be productive immediately. Highly customizable, used in some of the largest Linux deployments in the world (Brazillian public school system, WETA Digital, the city of Münich, ..) and backed by a passionate global community that is committed to freedom in software and culture.
SpecsUpdate
Pros
Pro Keyboard-friendly
Nearly all actions can be driven with keyboard commands. Window management, including effects such as desktop overviews, can be triggered with a keyboard control (or mouse gesture) and some even support filtering results (such as windows shown) by typing. The KRunner tool (default keybinding: Alt+F2 or Alt+Space) provides searching local files, online sources, unit conversions, math and more all from a keyboard driven interface.
Pro Adheres to standards
Standards adherence allows for interoperability and shared technology for X Window System desktops, with similar Wayland support being worked on. Applications not written with Plasma in mind work very well in Plasma as a result. The development team has also been instrumental in standard creation and adoption such as NETWM, X11 clipboard, icon themes, mimetype handling, application menu standardization, system tray protocols and notifications and more.