APPX (the installer format used by the windows store) and its successor MSIX contain decent security improvements, including filesystem and registry virtualisation and a capability-based permission system.
After the limited success of the windows store you can now get the same in standalone installers. It has been adopted by approximately nobody
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Developers initially revolted against Microsoft UWP and Mac App Store.
Not because they isolated the applications though! Because they were shit, and that's not a requirement.
Walled garden is not a substitute for security
APPX (the installer format used by the windows store) and its successor MSIX contain decent security improvements, including filesystem and registry virtualisation and a capability-based permission system.
After the limited success of the windows store you can now get the same in standalone installers. It has been adopted by approximately nobody