I don't think that the keenness of the children these days to enter adulthood is desirable. Children these days are in a hurry to enter adulthood and have access to technology. Due to this, they are learning things earlier than usual and getting matured beyond their age.
Hence, they are losing out their childhood and missing the joys that it brings with it. As per my thinking, they should grow at a slow pace and enjoy their childhood to the fullest. Children who miss out on their childhood cannot be a complete adult. The memory of childhood are like the treasures of the past which you enjoy in your adulthood. Once it passed, it never comes back. So, they should not hurry up to be an adult, and grow at nature's pace.