Skimmed over this interview, very good, very interesting. And I must agree that margarine is horrible. My dear parents love the stuff and, until my father became an invalid, they bought vast quantities of it, and used it liberally. When they moved in with me, we became "the house divided", margarine for them, butter for me.
I say "butter", but that may not be strictly speaking 100% correct --- I use Land O'Lakes spreadable button with olive oil, which at least is natural, back when I was having my grocer to shop for me online (early days of COVID when everything was pretty much closed to the public), one time they substituted LOL with olive oil for my usual LOL with canola, I said to myself "what are you maniacs trying to do to me? --- that stuff's going to be horrible!" --- only it wasn't. It doesn't taste of olive oil at all. I've used it faithfully ever since.
Cooking for a family of four, I have had to become a master "firehouse" chef out of necessity, and I am always on the lookout for things that will help me master my craft. There will be different schools of thought on this, but Velveeta Cheese Sauce ($1 a pack from Dollar Tree) can bail out an otherwise dodgy meal like nothing else, and it is not horribly calorie-rich. I get staples from DT when I can. Got to save a dollar.