Which discovery exactly do you mean - the one about lipotoxicity or the role of the microbiota?
Overall, prevention is the same for everyone, regardless of new research. The main thing is not to overdo calories, minimize alcohol and sugar, and move more. If you're at a normal weight and don't drink - your risk is minimal even without knowing the details of the biology. But honestly, it's useful for everyone to know at least the basics, because fatty liver can develop silently, without symptoms.
As for specific actions: usually they recommend balancing your diet, adding more activity, and getting regular checkups if you have risk factors like obesity or diabetes. If steatosis has already been diagnosed - then you need a serious approach, possibly a consultation with a specialist. But if everything's fine, then normal healthy habits are enough.