The answer is clear: they are too loyal to a fickle tradition.

答案非常清楚：那就是他们对变幻无常的传统太忠诚。

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Users are a fickle bunch, and changing technologies will offer them new options in the future.

用户是经常发生变化的群体，不断变更的技术将在以后为他们提供新选项。

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Not surprisingly, tourists are a fickle bunch.

不用奇怪，游客们是一撮易变的群体。

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She feels like a fickle princess in a fairy tale, trying out all the options this door, that bed and detecting flaws in each.

NEWYORKER: Shauntrelle

Fashion is a fickle mistress and a hundred years after they were last seen at the "Chelsea" of the day, gnomes from round the country are yet again heading back to the sacred showground of all things horticultural, fishing rods, toadstools and of course, gardening spades, packed and at the ready!

BBC: From the section Magazine

And the only thing more fickle than a fund manager is an Internet user, which is why so many jaundiced eyes are being cast on social media IPOs.

FORBES: How Will Wall Street Value Facebook's Users As It Prepares To Go Public?