Based on painful personal experience, this article illustrates the limitations of the Lean Startup theory and how it distracts founders from the fundamentals of successful entrepreneurship – the unlean lessons. It also explains how to overcome the theory’s shortcomings. Read on and learn how to protect yourself from wasting time and money on building unprofitable products and uncompetitive companies.

An acquisition, or an aqui-hire, is always a failure. Either the founders failed to achieve their goal, or – far likelier – they failed to dream big enough. The proper ambition for a tech entrepreneur should be to join the ranks of the great tech companies, or, at least, to create a profitable, independent company beloved by employees, customers, and shareholders.

There are plenty of myths floating around Silicon Valley, augmented by the legends of hot-headed young Turks such as Steve Jobs or Mark Zuckerberg, that you need to be in your 20s with a rigid mindset and a hefty ego. But they're the outliers, according to an extensive survey conducted by one startup incubator. [...] The results? As you can see in the infographic below, the young Turk thing is a myth. The best entrepreneurs are ones who work in their field first, gaining valuable real-world knowledge and experience for a decade or more. (We heard exactly the same thing from Google's startup acquisition guy).

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