No, it stays reasonably OK. A keep-warm plate in a coffee maker is definitely worse. Still, it's best to let the coffe get cold immediately if you don't drink

No, it stays reasonably OK. A keep-warm plate in a coffee maker is definitely worse. Still, it's best to let the coffe get cold immediately if you don't drink it right away. Keep it in fridge, and when you want hot coffee, heat it up with microwave. If you just want drinkable coffee, this is the method of least effort. People don't do this because for many of us, the act of making fresh coffee is a ritual, part of the enjoyment; it's about self-perception, and perception by others (keeping up with the Joneses; microwave-heated coffee? What a loser!)