BaalHabooze
When I was a bochur in yeshiva, someone once said over in the name of Rabbi Avigdor Miller zt”l that he felt people rely too much on their daily coffee and it can be detrimental (note what happens by a fast day to coffee addicts).
I love the taste of coffee, and B’H don’t have any withdrawal symptoms whatsoever on a Tzom when I cannot consume coffee.
BTW I won’t go anywhere near near tea of any description. I thinks tea tastes & smells awful.