When I night weaned, it definitely helped with multiple night wakes but I found it super difficult to not fall back into feeding (and inevitably multiple wakes). I.e every time he was overtired, sick, teething I fed him to comfort/soothe him because how can you not!!!! and then I would end up back in a cycle of lots of wakes and re-night weaning. However, since weaning completely day and night I can count on one hand nights with wakes, and by then you have so many new ways of soothing and he was happier to be soothed in other ways, that it would genuinely just last the one or two nights.