XSI had a lot of great workflows and now, that AD own these for 10 years now, they just did not brought them over. Not speak about that great "Bifrost"-nodal-thingy, which should have been a "replacement" for ICE in Soft. it´s really poor what AD delivers. The EOL for Softimage was commented by Mark Stevens (not at AD anymore by the way..) with the words: "We want to develop better software faster." That´s 5 years ago now.
So happy that I did not stepped into AD´s 2.000 Euro trap. My way is Blender and Houdini. Avoid AD where possible. But see yourself

