Earlier quoted context omitted.
Was this on the short term?
No, it's complete. I was drinking 4-5 cups of coffee a day and my brain was a cluttered mess. Now it's just mildly cluttered.
I've been drinking at least 2 cups of coffee ("cups" is a fuzzy measure) for maybe 15 years. Maybe I should power through the withdrawal and discover for myself if I've accidentally been undermining my mental clarity and life quality this whole time, instead of giving myself energy and helping concentration as I'd been assuming.