What new or old functionality do we really get in 10.1?

Why move to 10.1 from 9.1ifwe still didn't get back (from ilink 3.4) export from workspace to work space, "Lock" in commonspace, delete last iteration at specific state, no "to hold" in workspace (lock is not the same, can't modify once locked) and it's recomended to do as much as possible in stand alone browser as possible, without pro/e ?