While I'm not as close with my coffee mug as you are, my experience with coffee is such that a caffeine pill replacement would be a susbstantial difference.

By that I mean that a key part of my coffee experience is actually making (or walking to) the cup of joe. It's a brief break in my day where I can focus on something else, clearing my head even momentarily. Similarly, the act of drinking a coffee over ten minutes slows me down, allowing me to refocus on the task/s at hand. Popping pills might provide the same amount of caffeine, but in taking away that experience would detract from my coffee outcomes.