To add to your point #1: I recently transitioned to one meal a day in concert with a very minimal/maintenance strength building routine, of the kind others have

To add to your point #1: I recently transitioned to one meal a day in concert with a very minimal/maintenance strength building routine, of the kind others have described here. The combination has made a huge difference. I'm much leaner and more fit than I've been since my 30s. Obviously the trick is making smart choices about that one meal, which isn't as difficult as I thought it might be.