Comment # 1 on bug 960194 from Marcos Mello

I was surprised by this decision too. And there is another important factor: a
default 42.1 XFCE install pulls in GStreamer 0.10 only for xfce4-mixer
(required by xfce4-panel-plugin-mixer). GStreamer 0.10 is EOL and GNOME got rid
of it long time ago. openSUSE XFCE pattern sould drop GStreamer 0.10. It is
dead software.

xfce4-mixer + xfce4-panel-plugin-mixer can be replaced by
xfce4-panel-plugin-pulseaudio + pavucontrol + pulseaudio + alsa-plugins-pulse.
It will bring pulse into XFCE install, but I guess at this point there is not
too much controversy, is there?