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It matters because the actual coffee flavor is extracted from grind better at higher temperatures. I'm not a scientist but I trust those that have done the research and they say that the optimal temperature for hot water in a coffee pot is between 195-200 degrees or just a little under boiling.
The fact is that the change in temperature will cause a 'condensation' of the humidity that is natural in fresh coffee. That 'condensation' will result in the humidity leaving the bean when it congeals, and with it, much of its flavor and freshness. Warm is not good for coffee, but room temperature is fine.