Well, not anymore! I changed things up to see what my system would feel like sans coffee. So far, it's noticeable. I'm getting more sleep and I feel different, less edgy and (oddly) less prone to procrastination. There have not been any noticeable blips in my "regularity." Hallelujah!
As a partial replacement, I'm drinking tea--decaf. Out of shame I should punch myself in the throat. But that's why it's a temporary retirement. I'll be back one day. And I may commemorate that day with a brew of pure Kopi Lowak.