Would personal computers have gained GUIs without Jobs? Sure, but not as early. It took Microsoft 10 years to come up with a decent GUI, and that was with the example of the Mac staring them in the face. How likely is it that non-Apple smartphones would look and behave the way they do now if the iPhone hadn’t come out in ’07? And we’re still waiting for good tablets other than the iPad.
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In a sense, you’re using a Steve Jobs product whether it has an Apple logo or not