There are lots of articles on the internet about the many health benefits of apple cider vinegar. I guess it depends on what your goals are.
Even if you are doing LCHF, ACV will help lower postprandial blood glucose by 30+%. This is helpful with keeping insulin low which helps with insulin resistance, weight loss, etc. If you are diabetic this is very helpful for lowering a1c. Other benefits include lowering cholesterol and helping with satiety.
I take 2 tbsp ACV in water before meals. With so many healthful benefits, I can’t think of a reason not to!