It's not a matter of what it can do, but of safety/ease of use. I used a traditional pressure cooker for many years, but nowadays I see no reason to go back to babysitting the cooking process. Waiting for pressure to build? Deciding when it's done and lowering the stove to maintenance pressure? Setting an alarm, and then making the pot stop cooking? Nah, just set the timer at the very beginning and go for a walk.