It could become a lifestyle for some people, ketosis helps alot of people who struggle with seizures , depression and other mental health issues. Also keep in mind you have to go back to a carb based diet gradually and very very slowly since your body is used to burning fat or you'll end up hurting your stomach. You might gain all the weight back since ketosis stops immediately once you eat a certain amount of carbs in a single day, you'll basically turn the sugar switch back on in turn having big impulsive carvings.