It depends, but I think it's definitely a breakthrough since it's the first drug treatment after many years of people looking for a drug to treat it. I'm about

It depends, but I think it's definitely a breakthrough since it's the first drug treatment after many years of people looking for a drug to treat it. I'm about to read about it now so I don't know whether it was discovered randomly or through actually understanding a mechanism they were creating a drug to target, but if the latter it would be a massive breakthrough potentially as it could signal that iterative work in the same area might lead to rapid improvement in the form of new drugs or even just by something like changing the dose in a way they've not yet tried. How is this not exciting? Breakthrough (and exciting) don't mean "this problem is solved fully". Or as the experts quoted in the article put it: 'Alzheimer's Research UK said the findings were "momentous".'