Major League Soccer (MLS) is the top professional soccer league in the United States and Canada. Despite its recent surge in popularity, some have questioned if the league is expanding too rapidly. Critics point to the league's rapid growth, the high number of teams, and the inadequate quality of play as reasons for their concerns. Supporters, however, argue that the rapid expansion is necessary for the league to remain competitive and to attract new fans. Ultimately, the future of MLS depends on its ability to maintain a high quality of play while balancing growth with sustainability.