Life vests, wetsuits, drysuits, non-stretch ski ropes, and gloves are the norm. So if riders just want to cruise, they can go for miles with a lot less effort.
Young kids pick it up quickly.
Jumps are the first manoeuvre that riders usually learn. Then inevitably they try to flip it. Many riders pick up inverted manoeuvres within the first or second year they ride. Air Chair has been making sit-down style skis since about 1989. Then the all new Sky Ski was released back in 1998, and ever since both manufacturers have been pushing the envelope to create a bigger, better, stronger, faster mousetrap.