These have been my findings on these two days of using the "unpatched" session: - QT_QPA_PLATFORM defaults to xcb but the Plasma session itself is running on Wayland, this can be verified via system settings. XDG_SESSION_TYPE is wayland. When checked through qtdiag on Konsole, it reports xcb. - Spectacle's rectangular selection does not work on xcb, so out of the box this can cause annoyances. If forced to wayland, it works fine but Spectacle itself appears on the screenshot or in the middle of the fading out animation. - Discord, Element, Firefox (with MOZ_ENABLE_WAYLAND=1), Signal, PLECS, MATLAB, Codium, GIMP, KiCad, LibreOffice, Inkscape and Kdenlive seemed to work with no problems on the "upstream" session. All the electron apps in the list are running on flatpak except Codium. - As usual, the NVIDIA GPU (Optimus) feature of PRIME render offload did not work on Wayland, nevermind launching a full session. - Kdenlive crashes if forced to Wayland, but it does work under xcb. Error info on Wayland seems to not help much by itself: QWaylandGLContext::makeCurrent: eglError: 3009, this: 0x562426067b00 QWaylandGLContext::makeCurrent: eglError: 3009, this: 0x5624272cc5d0 QWaylandGLContext::makeCurrent: eglError: 3009, this: 0x7faf18009410 QOpenGLFunctions created with non-current context Under xcb it detects NVENC, as expected. Can't tell for Wayland since it was crashing, but in theory it should. - On either session, I could not type "tildes" (spanish accent mark) on Telegram - Flatpak. No idea why this would happen, but this was not an issue on Firefox, seééééééé thís. - On LibreOffice, the tilde was not working for QT...=wayland, but on xcb it did. - I set my default session to Plasma (Wayland) and almost forgot I had it that way; aside from the Spectacle issue and the inherent smoothness to using Wayland, I could not notice an important difference from the XOrg session, which from my point of view is good news for Plasma in general. - Right click menu on Full Wayland seemed to be unrealiable: sometimes it would ignore my left click when selecting an option. - Sometimes it would be obvious when something was running on XWayland because the application would launch into a blackscreen during the fraction of a second. - On QT...=wayland Plasma would misplace prompts (e.g. Gparted asking for permission) at the top left corner, while if QT... is not forced by me this would not happen. I think a good approach would be to keep Full Wayland as is and have a Wayland session without "the patch" (not force any variables in that one). This option would also allow users with the appropriate knowledge to create their own .desktop sessions and fine tune their experience, but they can already sort of do that. The key difference is that they can force GDK_BACKEND if preferred, but only if they want to. If some help is needed to test something, let me know. * That is, once my ISP gets his .... right and I can do the 5.85 GB update that just dropped on my main laptop :D