To expound on that...
What I mean is when you cut calories, your body adjusts. Let's say your maintenance level is 2400 calories a day. You cut back to 1700. You lose weight. Eventually, weight loss slows. Your body is adjusting. It realizes it's only going to get 1700 calories, so it slows things down so it can maintain at that level. It becomes your new set point if you stick with it long enough. You then get discouraged at not losing. You either give up or cut more. If you give up and go back to eating 2400 a day with your metabolism now at 1700, you'll gain over a pound a week. That's when the evil yo-yo really gets ugly. I've done this many times. That's how people gain back what they lost plus some. It's how I just kept getting bigger.
Fasting is supposed to preserve your metabolism. It can ramp up even higher at times, and drop down a little bit as well. But not as drastically as calorie restriction.
But you're right that it will take monumental discipline by me as time goes on. Will I cave and start binge eating? Will I get to my goal and just start eating like I did to get me to 400 lbs? That's something I'll have to work on, but I have months before I'm anywhere close to my goal and that's with being very aggressive. I will have to incorporate the things you mention. Finding the right foods, and going to IF/OMAD, etc.
As for being a sprint vs. marathon, I don't buy into the thinking that we should lose 1 lb a week and lose slowly. I started at 400 lbs. The less time I can spend morbidly obese, the better. I need to cure my insulin resistance before I get Type II diabetes. I want to lose it as fast as I can so I can get on with the rest of my life. If I had a wife and family, I may be more likely to take it slow. I don't have those luxuries. I want to lose this while I'm still under 40.
BTW, made it back to the gym last night. Back is feeling much better. Got some treadmill in and some full body lifts. 15 minutes in the sauna. Lost 1.8. Feeling good.