I've been sober almost 7 months, and started taking Wellbutrin a few months ago to replace another anti-depressant I had been taking. I didn't even think about whether it would help with cravings, because my cravings stopped long ago. Maybe it will assist with future cravings that would otherwise pop up?
Either way, I'm not taking anything for granted in my sobriety. Cravings or not, I won't drink.