In another life I was a cook. Our chef instructor taught us to cook meat with the oven set at the target internal temperature (e.g., 140°F). Since most ovens won’t go that low, he said to use the lowest possible temperature (e.g., 200°F or 225°F).
Once I cooked a family dinner using a cheap beef roast and this method. My father ranted the whole time about how it wasn’t going to work and the meat would be tough. Then, when it was served, he admitted that it was tender and excellent.