The Mark Bell Power Project podcast has a lot of material on this and has had a lot of good guests on in the past few months, take a look through the archive for the past year. Mark Bell himself is a retired powerlifter who used to weigh 330lbs and has tried a lot of different diets himself over the years.

A recurring discussion is how no diet is one-size-fits-all and there is no one diet to rule them all either (anyone claiming their way is the only way usually has a book to sell you, fancy that.) Some people do well on IFM, others feel like shit on it and have better success tracking calories or doing keto. Some people can't do carnivore because they're too prone to gout and other inflammations, maybe they can do it in the future after they've resolved that issue some never will get rid of that reaction.

Also in a recent interview was talk about how you can't stick to the same diet plan forever either, your body eventually adapts in ways that will cause you to stall out requiring changes to work with your new metabolism and get things rolling again.