This time is indeed different, though not because the boom-and-bust cycle has miraculously disappeared.

这次的确不同，但并不因为兴盛-衰落循环圈神奇消失了。

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Congress typically extends the PTC two years at a time, creating a boom and bust cycle for the wind industry as the uncertainty about whether the tax credit will be renewed plays havoc with long-term planning.

FORBES: California's New Solar-Wind Hybrid Power Plant Greens The Grid

This time is indeed different, though not because the boom-and-bust cycle has miraculously disappeared.

ECONOMIST: Silicon Valley and the technology industry