While I suspect being played for reactions, I would like to add that the advantages of tesseract lie not just in what tesseract does, but what it enables: from such things as gImageReader to possibly more surprising use in software like WordWeb and a myriad other products, many of which you and I will never hear about because they are used only by small businesses or individuals. Some of those products simply wouldn't exist without tesseract, others might continue but in a less useful form.
The same applies to a large number of open-source projects - think database engines and so on. The power (and cost) of the behemoth is not always needed, nor even wanted, for many projects.
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