The KDE Plasma Linux desktop environment is already a feature-rich desktop for both productivity and gaming, but the KDE development team has been hard at work adding ever more features to the DE and polishing the experience. One of the newest additions to KDE, apparently coming in Plasma 6.7 and no...
I assume Valve would prefer everyone use Steam.
For games, sure. For the rest of the stuff a computer does? Why do they care?