For some things, it’s invaluable. With small kids, we don’t often get to eat right when we want. So if I take steaks off a grill at medium rare, they’re fully medium by the time we get to eat, and that’s disappointing. But with sous vide, I only char them for a minute per side on the grill, and they can sit a few minutes staying the perfect medium rare while we wrangle the family into chairs.
But it’s not for everything. I still prefer to braise a lamb leg for 5 hours in the oven.