So far, besides the paradoxical effects noted yesterday, I think I can say that making it through a longer fasting window to a late eating window is easier while drinking a cup of coffee or two.
Monday and Tuesday, without coffee, barely made it to mid afternoon. Yesterday it was fairly easy to make it to 5:30.
Today I started to feel a little low on Will Power at about 1:00, had a second cup of coffee, problem resolved.
Of course you hear people say this all the time, "Caffeine is an appetite suppressant". But I didn't expect the effect to be more than a fringe, subtle, placebo level effect. But it was pretty clear cut.
Since there are other effects of coffee that I want, like antioxidants, reduction in insulin resistance, increase in autophagy, and a few more, and since I didn't get the reduction in stress and increase in sleep quality I wanted, I'm happy to be back on coffee.