I self-withdrew Xanax a few years ago. I did a weaning schedule. I'm fine now without it. Yeah, it works. Too well. I believe it was partially the Xanax that led me back to drinking after 18 years sobriety - it gave me a too vivid memory of that euphoria/numbing. I'm glad to be rid of it.
The caffeine really got to me in a negative way in early sobriety, but I'm able to have two cups of half-caf in the mornings now with no anxiety or jitteriness.