It definitely has an impact on my speech too. But I’m not that lucky, ditching coffee and alcohol just keeps my stutter blocks at it’s “barely tolerable” level. I have a cup of coffee every couple of months and I’m always careful with my timing so that I wouldn’t need to speak the rest of the day (after the coffee). Realised the connection on my second year of uni, and getting that master’s in architecture without coffee was hard! But still managable