I agree with the pressure cooker part of that article, but not the oven. I do -not- like to leave my house with the oven on. It’s a personal trust issue. I have no idea why I would trust a slow cooker over an oven, but for one, a slow cooker doesn’t approach burning temps, and is usually insulated with a pretty hefty stoneware insert. Also, though it’s 2019, my oven lacks even the basics of easier programming that does things like, high for 2 hours, low for 4 hours, warm after that (which, btw, mimics my work hours perfectly.) To add to that, my slow cooker was less than $50 bucks. Why would that be an either/or option. It’s a, “also have,” option.
It doesn’t have to be a slow cooker though. Instant Pot is so ideal because it’s programmable, but so much faster than slow cooking.