@nprofile1q... I'm with you 100% BUT: In discussion about change, I am constantly met with a specification of the desired system that is effectively just - the current system. No two systems are 100% alike, nor 100% compatible. If you are unprepared to move unless every single feature of the current system is present in the alternative, you will never move.
Related, people will allow an assumed flaw to be treated as an actual flaw. "Sometimes I need to exchange documents with people who can't read an ODF file". Ok - how often? Quantify it. Give it a value. Compare that value to the gains that change would bring (also quantified). And if the former is smaller than the latter - it's not a showstopper.
All too often the debate just stops because a loud voice says "nup" and is not challenged.