I would not be surprised if Velvia 100F is given the chop any time soon. It has been universally scorned for its quirky colour palette and lack of punch compared to 50. But is it a case of "one man's tonic is another man's poison"? I'm sure it has its ardent followers who like the flashy, avant garde palette far removed from its stablemate. I suggest the OP take careful note of all comments made in this thread and buy a roll of one of the Velvias, expose them and examine the results with a critical eye. That will be an interesting experience.