It's something that butthurt fanboys say to explain their hatred of all post-FFIX entries because OMG HOW DARE THEY CHANGE ANYTHING AND NOT MAKE THE SAME GAME FOR THE TENTH TIME AROUND, HOW DARE THEY TRY SOMETHING DIFFERENT!"

See also:

-Resident Evil 4 and on is not Resident Evil
-Tomb Raider Legendand on is not Tomb Raider
-DmC: Devil May Cry is not Devil May Cry
-Metroid: Other M is not Metroid
-Mortal Kombat 4 and on is not Mortal Kombat
-Crash Bandicoot 4: The Wrath of Cortex and on is not Crash Bandicoot