That's a nice writing, to see the experience of somebody who went through intermittent fasting. It is interesting to see that you were able to handle intermittent fasting with a 4 hours window, that is quite challenging!
I wanted at some point in my life to start intermittent fasting, but I never got the discipline necessary to stick to the eating windows. I imagine that it is pretty effective since you decided to keep the intermittent fasting after all this time, with a window of 4 hours, that is a big achievement in my opinion :)
Once the habit kicks in, it's not really difficult.