Sandbox/Security question

[riveravaldez]

Hi, I'm not subscribed to the list, being using Flatpak for some time
(in Debian, Ubuntu and Arch) and stumbled upon this publication and
wondered which is Flatpak's consideration about:

https://flatkill.org/2020/

Sorry if this is not the place to ask.
Main reason for me to use Flatpak/Flathub is precisely the intention
to keep proprietary software under some control (instead of installing
their official packages), so, those points seemed relevant (the
desktop integration not so much).

Any comments?

Thanks a lot in advance!
Kind regards.