When I want coffee, I want it now and I don't want to have to wait for it to cool down either. I don't want it so hot that it burns my mouth and leaves a flap of skin hanging down. So when my coffee is too hot to drink I get a little irritated. I also don't want to have to put ice in my coffee either because watered down coffee is nasty.
How long has the tea bag been on the market? Other than the little staple holding it together, there's nothing about it that can't be composted. Oh I see, they can't figure out a way to lock you in with a simple tea bag. That's why I use an espresso maker to make my single cups.