Indeed, KWin, the window manager for KDE Plasma, has been improving its support for rounded corners in window decorations and effects. As of recent updates, many KWin effects have been updated to respect rounded corners, providing a more cohesive and visually appealing experience. If you're running a recent version of KDE Plasma, you should see these improvements in action. If not, make sure your system is up to date to benefit from the latest enhancements.
