It's a tricky argument, and you can't fall victim to nostalgia. Compare FF6 to a new one today, and give them to a person who has never played an RPG before. Invariably, they're probably going to come out liking the new one -- at least, initially. I think there's a point of RPG experience at which a player gets over the first thrills and fun of playing a game with an RPG system and gaining experience, and starts to crave something deeper. Right now, my top priorities in a game are character roundness, atmosphere, and plot. Chrono Cross, for instance, has these in masterful form (...okay, not character roundness for some), but it's not something that can be picked up and roared through by a new gamer. It's almost like an acquired taste.
I may be totally wrong, though, since I have a limited experience in RPGs. To date, I've played BoF I & II, FF6, CT/CC, SMRPG. And I think a couple others.