Elf Sternberg

I think sometimes what happens is that the person has had years of struggling in obscurity to refine what becomes the initial "breakthrough" that vaults them to recognition, but either rushes the follow-up to capitalize on success, or simply used up all their original ideas on that first offering. Its also a lot more scary to try exploring something new than just putting out a variation on the same theme as what brought fame and fortune, especially if you're now making your living from XYZ (whatever XYZ happens to be).