Alec Hogg: WhatsApp opens doors for competitors

Having witnessed the collapse of seemingly impregnable Netscape, MySpace, Napster and Blackberry, I have a healthy respect for disruptive tech. In this sector, nothing can be taken for granted. Even for Gorilla – Jeff Bezos of Amazon never allows his colleagues to forget this (it's always "Day One" there). Ditto at Apple where founder Steve Jobs and successor Tim Cook personified the Silicon Valley credo that "only the paranoid survive".

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