You don't need Flatpaks or AppImages, those are just "convenient". Lots of well known software is distributed using the "unzip the folder and run the binary" sc

You don't need Flatpaks or AppImages, those are just "convenient". Lots of well known software is distributed using the "unzip the folder and run the binary" scheme - the same scheme commonly used for win32 apps that don't have an installer. Firefox and Blender spring to mind. "Linux" just doesn't have an ABI problem. Provide all the libraries your app needs, and it will run.