@ssafar Exactly. Personally, I consider any software that an ordinary person cannot install other than in Docker or Flatpak is a bloatware. Unfortunately (or rather fortunately) I found out that I can't run any such bloatware, because Flatpak depends entirely on the systemd which I don't have (and don't want to have).
On the other hand, some isolation would be useful in Linux. But not in the style of Flatpak or Docker. I would rather like to see it already at the level of the packaging system: dynamic chroots would be created for each program, mixed according to it's needs (docker does something similar, but works with the whole system image, this would be at a lower level). For example, if I wanted to install nginx, the "packages" pcre, zlib, openssl, geoip, mailcap and libxcrypt would be dynamically mixed in the chroot.
Each chroot will be mounted to limit the software as much as possible (on most directories noexec, nosuid, nodev, if the exec needed, then the whole directory readonly).
Maybe there is a distribution which works like that? I think it could be possible to replace, for instance, pacman and make it to install already existing Arch linux's packages in chroots. Just re-use it's existing repositories. All you need is mount --bind, layered filesystem, and/or maybe cgroups.
And then, of course, a tool to bind shared directories into chroots - but only those needed. For instance, I would like to isolate my Firefox to only see my Download folder.
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