In response, as solicited by "yaya", it sounds as if you are overanalyzing a good cup of coffee. The proof of any coffeemaker is in the taste of the final product. Put away your pretentious analysis of methodology then trust in your taste preference of a good cup of coffee. If it isn't hot enough for your taste, warm it up by any method in the realm your superciliousness deems proper. If you "...like my coffee hot", as you stated, then why are you leaving it on the hot plate for 2 to 4 hours instead of enjoying freshly brewed coffee?