由于折叠屏手机的工程难度更高，为了打造综合体验不输直板机的产品，过去几年，智能手机厂商纷纷斥巨资进行研发投入。比如，3月11日，刘作虎透露，2018年以来，OPPO在折叠屏上已累计投入超30亿元研发资金，相关专利数量跻身全球TOP3。
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Фото: Ludovic Marin / Pool via Reuters
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The infrastructure projects that actually worked (e.g. Linux, Git, PostgreSQL) all followed a different pattern. They were useful before ecosystems formed around them. Early users drove the architecture. Small, immediate utility created real feedback loops, which created broader adoption, which created the ecosystem. No reliance on hypothetical future users was required.