@qgis Why does the Deb/Ubuntu Quickstart page section say "Simply install the latest stable QGIS (4.0.x Norrköping) in your Debian or Ubuntu without having to edit config files." and then go on to discuss editing sources.list? Should that be a link to flatpak/appimage installs or something? I would like to try 4.0 without touching my 3.x in any way.