Most new navigation systems used in aviation have been a game-changing improvement from what preceded them. If you're wondering what NDBs could possibly be an improvement on, try navigating at night solely by lighted beacons. (As terrible as this sounds, in the 1920s there were probably so few electric lights that the beacons actually worked okay. It wouldn't work so well today.)
I was pleased to see this article in part because I have a lot of early primary students, with whom I'm been discussing good take-off technique. It's not that hard to get the plane off the ground, but it's not simple to do it well. Rotate too early and you induce excessive drag that will lengthen your takeoff roll. Rotate too late and you will both lengthen your takeoff roll and place excess wear on your gear and tires. Worst of all, rotate too aggressively and you'll leave the ground too early, resulting in either settling back onto the runway or a low altitude stall. So stay on the centerline, when you get close to flying speed, set a gentle climb attitude, and let the plane takeoff when it's ready.