Personally i don't see LC diet as a diet any more, it's simply a way of life that is easy for me to maintain and I am healthier for it and will continue with it. Looking back as a child it's what we ate anyway. Fruit was a treat and rarely if ever did we eat sugary foods or carbs to the point we are eating them today. Processed foods and the list goes on we never even heard about . My father God rest his soul, lived to 90 on very high fat and little carbs. He grew all our own foods, so i am simply doing what was done as a child. It isn't a diet it's a life style. That's my take on it for what it's worth.
Your take on it, Its worth a lot, and hopefully will be appreciated by others, i.e. Keto as LC I personally do not view as diet, I view as way of life style eating plan, a diet as I understand, may be wrong... when a Doctor places one on a strict regime not to be taken off, monitored daily, there is a difference and the two not to be confused as one and the same, one is by choice decisions, the other due to arrangements by a Doctor or other.
As your Father, my grandmother too high fat low carbs, jumped on the jumbo 747 400 at the ripe young age of 79 looking for a new life in Australia, and up until her last days smoked 3 cigars a day, drank glass of champers per day or vino and enjoyed a "coolie" fosters larger now and again, until she passed away at the age of 94, perhaps our Fathers and Grandmothers style of eating and life, should be looked at for the future??? who know, I read from a good book by a Doctor, sorry, "I cannot say his name, or the book or quote", as the last time I did that last week, I was informed my post was deleted, lets just say....yes, one can have a choc, a piece of fruit, a piece of cake, but in moderation, i.e. as "years ago", when these were a treat. Good points raised Moggely, diet is diet, lifestyle eating plan is quite another thing.