I am just now fully in the camp that wonders if all of this just way over complicates things. Track your macros, eat in a calorie deficit if you want to lose weight. If you see you aren't losing weight, increase the deficit. Granted, it means eating relatively strict and disciplined, but once you're doing it, it isn't hard. And stop using the scale as much as the mirror. Sure, it helps to know what and how much you have lost, but it can fluctuate greatl0y at times. Just get an averager over a few weeks anf go from there. I figured out a long time ago that if I want to lean out, I keep my protein very high (.8 to even 2.0 X my body weight) and just lower my carb intake. Say, from 300 g to around 50-100g a day. ANd with that, I lower the fats to as low as 20 and average around 50g a day. Granted, I really am a leaner guy, so numbers can vary for others, but this is so so much simpler. In the end, most of us want to be lean to be healthier but a lot of guys I know also want to look good. That's my main goal. Asthetics. SO I do not care about ketosis or blood sugar or whatever. I train for hypertrophy, train with my hair on fire, eat all week to support that and have a little fun of the side. A cheat meal a week. Occasionally a full "cheat" day even. But it just works. I don't worry about seed oils, food coloring etc. B/c I eat so healthy, that stuff really isn't in my food except t hat cheat mean potentially.
Anyway, my 2 cents on this. Hey, if these diets work for you, go for it. But they are not the only way. Look at it this way, if a diet works, its only b/c it has you in a calorie deficit. That's it. There isn't any other magic formula or combo. The science supports that as well. SO the biggest thing is find what you can maintain and do and do not worry about the rest. If you like keto, do it. Fasting? do it whatever? Do it. But just know, just tracking macros (and not like some OCD weirdo-just keep a general, honest knowledge of what you actually put in your mouth) wsorks great as well. Most here are not some special being that only diet "x" is the only thing that will work for you. Deficits are deficits...