I used to have a subscription to Cooking Light magazine, still buy an issue now and then. They almost always call for real butter in their recipes, maybe not slathered in pounds of it ala Paula Deen, it but real butter. A lot of their recipes are very good BTW and healthy even with real butter.
I used to churn butter at my grandparents places when I was a kid. My grandmothers both cooked with butter, because they MADE it. And whatever my mama fed me didn't stunt my growth. When I was 45 I could still lift an engine block, but now that I'm (almost) 52 the 8/4 hardwood I've been wrassling all week, with the overtime, has done tuckered me out.
But that exhaustion is probably something else. Only my liver knows for sure.