Cars don't have much network effects, the best car is bought regardless of the dominant brand of the year (I agree with your point on the car). However, social

Cars don't have much network effects, the best car is bought regardless of the dominant brand of the year (I agree with your point on the car). However, social network have a network effect which makes it very hard to switch, if all your friends use app A, it's difficult to make them use app B.