Thankfully I do not drink that much, maybe 2 cups a day. Tried decaf a couple of years ago when I found out I had high blood pressure, but switched back.
Absolutely can not drink Cuban coffee, makes me shake. My stomach is not bothered by drinking this small amount of coffee. Can't drink it past noon though, no sleeping then.
I think Tealbumblebee's advice is good. Going to try to use less coffee when I perk a pot.