Most of my saws don't have chain brakes and when I run one with a brake I keep forgetting they can be useful at times, like setting the clutch after removal and starting a saw with a long bar in brush. Click them to death if it makes you feel good, I know what keeps me safe and it's not the brake. We are all at the mercy of safety devices mandated by committees that are tasked with keeping the most inept humans from injury, some are good additions like air bags in cars and some are an endorsement for dumb activity, such as "lane departure warning" and "forward collision avoidance" features that tell idiots with their cell phones that it's OK not to pay attention to their driving.