I think there are 3 reason why it works for me
1) My appetite really deceased. Easy to stick to a plan when you’re not hungry all the time.
2) My health dramatically improved. I have GERD due to a hiatal hernia and even with a double dose of medication, I was still having bad heartburn. Now, I still need medication, but in a much lower dose and I haven’t been bothered by heartburn (unless I forget to take my medication)
3) I don’t follow the plan slavishly. Example if we’re going out to dinner, I’ll still skip fried breaded entrees, ask for double veggies rather than the starch, but I might have a fancy cocktail, or a really good dinner roll loaded with butter, or a creme brûlée, or a bite of my husband’s french fries or fried calamari. Since I’m not hungry all the time, I can save my splurges for things I really, really like, not just cause somethings on the table. And I’m happy with just a bite or two to savor. :-)
It sounds like you have found balance. Moderation is so important. I do hope your lack of appetite is not a health related issue tho.