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Off topic I know, but it is not necessary enterprise consultants who push for buzzword-compliant fads. Individual developers generally likes to work on exciting new stuff and might also consider what looks good on the CV. Developer driven startups certainly seem to be just as fad-driven compared to enterprises which are generally more conservative.

That said, it is an important observation that widely used technologies are judged on the reality of their use, while less popular technologies are judged on their potential. For example Java is judged on the quality of the code people see in the real world, developed and maintained over long time by developers of varying skill, while Haskell is judged on examples written by experts to showcase the benefits of the language.