Why is pickleball so popular?

Pickleball combines elements of both tennis and ping pong.   Tennis can take up to 2 years to learn the skills in order to play a proper tennis match while pickleball can be learned very quickly.   The motor skills involved with the fast play of ping pong are necessary with pickleball however there is more exercise involved with pickleball.   When you combine the easy to learn nature of pickleball with the fun exercise involved this is why pickleball is becoming the fastest growing sport in the United States.