I tested an upgrade where I added gnome-software-plugin-snap to the ForcedObsoletes section of ubuntu-desktop and the following packages were marked for removal. (I did a diff of removed packages w/ and w/o that package in ForcedObsoletes.)
command-not-found-data example-content gcc-7-base imagemagick-6-common libalgorithm-diff-perl libart-2.0-2 libasan4 libboost-system1.65.1 libboost-thread1.65.1 libclass-xsaccessor-perl libcpanel-json-xs-perl libexempi3 libexiv2-14 libexporter-tiny-perl libfakeroot libfuture-perl libgtksourceview-3.0-common libgweather-3-15 libhunspell-1.6-0 libhwloc5 libilmbase12 libilmbase24 libio-async-perl libio-pty-perl libip4tc0 liblist-compare-perl liblqr-1-0 libmozjs-52-0 libnet-ip-perl libnss-myhostname libnumber-compare-perl liboauth0 libpackage-stash-xs-perl libplymouth4 libpython2.7 libraw16 libreoffice-avmedia-backend-gstreamer libreoffice-style-galaxy libstruct-dumb-perl libtest-fatal-perl libubsan0 libunicode-utf8-perl libusbmuxd4 libxapian30 libxml-libxml-perl libxml-namespacesupport-perl libxml-sax-base-perl libxml-sax-expat-perl libxml-sax-perl libxml-writer-perl libzeitgeist-2.0-0 light-themes linux-headers-5.4.0-42 linux-headers-5.4.0-42-generic linux-hwe-5.4-headers-5.4.0-47 linux-image-5.4.0-42-generic linux-modules-5.4.0-42-generic linux-modules-extra-5.4.0-42-generic python-talloc python3-asn1crypto python3-crypto python3-keyrings.alt python3-oauth python3-simplegeneric python3-zope.interface python3.6 python3.6-minimal qpdf t1utils ubuntu-sounds ubuntu-system-service xserver-xorg-hwe-18.04 xserver-xorg-input-all-hwe-18.04 xserver-xorg-input-libinput-hwe-18.04 xserver-xorg-video-ati-hwe-18.04 xserver-xorg-video-fbdev-hwe-18.04 xserver-xorg-video-intel-hwe-18.04
I tested an upgrade where I added gnome-software- plugin- snap to the ForcedObsoletes section of ubuntu-desktop and the following packages were marked for removal. (I did a diff of removed packages w/ and w/o that package in ForcedObsoletes.)
command- not-found- data 6-common diff-perl system1. 65.1 thread1. 65.1 xsaccessor- perl json-xs- perl tiny-perl w-3.0-common compare- perl compare- perl stash-xs- perl avmedia- backend- gstreamer style-galaxy utf8-perl namespacesuppor t-perl sax-base- perl sax-expat- perl 5.4.0-42 5.4.0-42- generic 5.4-headers- 5.4.0-47 5.4.0-42- generic 5.4.0-42- generic extra-5. 4.0-42- generic keyrings. alt simplegeneric zope.interface system- service xorg-hwe- 18.04 xorg-input- all-hwe- 18.04 xorg-input- libinput- hwe-18. 04 xorg-video- ati-hwe- 18.04 xorg-video- fbdev-hwe- 18.04 xorg-video- intel-hwe- 18.04
example-content
gcc-7-base
imagemagick-
libalgorithm-
libart-2.0-2
libasan4
libboost-
libboost-
libclass-
libcpanel-
libexempi3
libexiv2-14
libexporter-
libfakeroot
libfuture-perl
libgtksourcevie
libgweather-3-15
libhunspell-1.6-0
libhwloc5
libilmbase12
libilmbase24
libio-async-perl
libio-pty-perl
libip4tc0
liblist-
liblqr-1-0
libmozjs-52-0
libnet-ip-perl
libnss-myhostname
libnumber-
liboauth0
libpackage-
libplymouth4
libpython2.7
libraw16
libreoffice-
libreoffice-
libstruct-dumb-perl
libtest-fatal-perl
libubsan0
libunicode-
libusbmuxd4
libxapian30
libxml-libxml-perl
libxml-
libxml-
libxml-
libxml-sax-perl
libxml-writer-perl
libzeitgeist-2.0-0
light-themes
linux-headers-
linux-headers-
linux-hwe-
linux-image-
linux-modules-
linux-modules-
python-talloc
python3-asn1crypto
python3-crypto
python3-
python3-oauth
python3-
python3-
python3.6
python3.6-minimal
qpdf
t1utils
ubuntu-sounds
ubuntu-
xserver-
xserver-
xserver-
xserver-
xserver-
xserver-