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According to Door Knocker, almost half of the portals are unavailable on Ubuntu 16.04, compared to only one unavailable on Fedora 39 with GNOME, which means Flatpaks running here may have more limited capabilities than usual.
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this post was submitted on 22 Oct 2023
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Flatpak has relatively weak sandboxing, takes up a lot more storage because sometimes dependencies get bundled a few dozen times, and most distressingly depends on the application developer to be available to do things like address supply chain attacks.
I don't think you understand flatpaks. Flatpaks have dependencies such as the gnome or KDE frameworks. Those frameworks are only installed once so I'm not sure where you are getting the idea that they are installed multiple times.
Also flatpaks usually come from flathub.org which is unlikely to be compromised. It not impossible but they seem to be pretty good about properly labeling apps.
because xorg exists, not because flatpak can't do sandboxing well
only if there's a need to do so. identical runtimes are shared
yeah as if a rogue package maintainer can't do the same