I should have been more explicit. That one paper put the cross over point at about 50 units a week, most others put it much lower. These are all also observational studies, and to actually get the direction of causation is hard. It could be for example that people who drink that much are richer than those who drink less, and being rich is good for your health.I about choked when I saw somebody post that up to 50 units a week is probably healthy. That's both binge and alcoholism by everything I've heard at home. But I finally skirt by on that number as ok!
The only thing that can really be learnt is that we do not know how much alcohol is good or bad for you. It probably varies massively by the person anyway.