When FF VII lauched, FF VI was the tru hardcore FF fans game, VII was for newcomers and 3d-whores.
When FF VIII lauched, FF VII was the tru hardcore FF fans game, VIII was for newcomers and emos.
When FF IX lauched, FF VIII was the tru hardcore FF fans game, IX was for newcomers and kids.
When FF X lauched, FF IX was the tru hardcore FF fans game, X was for newcomers and casuals.
When FF XII lauched, FF X was the tru hardcore FF fans game, XII was for newcomers and mmo fans.
When FF XIII lauched, FF XII was the tru hardcore FF fans game, XIII was for newcomers and graphicwhores.