>    I am just now upgrading Jessie and something wants to pull in libsystemd0.  I have no idea what.

     I made some trials.

     On Devuan Alpha2, libsystemd0 is required by (at least) policykit 
and gvfs.

     - gvfs is necessary if you want xfce4 to show an icon on the 
desktop when you plug in a removable media.

     - policykit and policykit-gnome are necessary if you want to run 
synaptic from xfce4's menu.

     Didier