I've grown to realize that it's for sure about balance. We have to cover the bases because the food just isn't as nutritious as it used to be. The only one that makes absolutely NO fucking sense is Vegan lol
Keto seems pretty good in a lot of ways. I for some reason always think of Paleo when I hear Keto though.
My big win over the last decade is intermittent fasting! That has helped me the most, I would say.