[probonopd]

There's also this artificial distinction between the uninstalled and the installed form of the same software. Once you have installed it, it is married into a system that makes it very hard to get it out of the running system again and transfer it to another system (unless you kept the debs or hope that they are still online in some repo).

A better system is one in which the archive/installer and the installed instance of a software is one and the same. Such as a Mac .app bundle or an AppImage for Linux.