Detailed review of Plasma 6.4 desktop environment, covering look and feel, new dark theme, numerous ergonomic regressions, significant problems with basic font rendering and raw performance in a Wayland session on a system with integrated AMD graphics, superior X11 session behavior, problems with Discover and software management, various issues and bugs in the underlying KDE neon platform - installer inconsistency, disappearing icons, default browser configuration, repeatable Samba connectivity crash, apt error messages, alarming future trend for the Linux desktop, other observations, and more
Say it with me: KDE neon is a testing ground; there is a reason people work on KDE Linux; Ubuntu LTS itself is already a frequent source of problems; KDE killed LTS releases for pretty much the same reason - backporting stuff sucks.