The following is an example of cultural lag in the United States and the reason why it has come into existence.
Virtual appointments with doctor:
Meeting the doctor virtually and not going to the clinic to see the doctor in person has become a new trend in the United States. Though this trend is not followed by many, it is gradually gaining acceptance in most parts of the country. This trend is slowly replacing the culture of seeing the doctor in person and getting a check-up done which has been in practice for centuries.
The reason this cultural lag has come into existence is that the technology is developing rapidly and changing how people interact with each other even person to person.