Good summary of the status of youth league football not only in Massachusetts but in general - 5 other states have considered bills like this in response to the traumatic brain injury issue.
"In recent years, tackle football has lost some of its luster among middle and high schoolers, and their parents. In 2017, about 2.4 million athletes from ages 6 to 17 regularly played the sport, down slightly from the year before, according to the Sports & Fitness Industry Association. Rugby is gaining popularity because its tackling techniques appear less risky, which increasingly appeals to coaches leery of concussions."
https://www.nytimes.com/2019/03/01/sports/youth-tackle-football-ban.html
"In recent years, tackle football has lost some of its luster among middle and high schoolers, and their parents. In 2017, about 2.4 million athletes from ages 6 to 17 regularly played the sport, down slightly from the year before, according to the Sports & Fitness Industry Association. Rugby is gaining popularity because its tackling techniques appear less risky, which increasingly appeals to coaches leery of concussions."
https://www.nytimes.com/2019/03/01/sports/youth-tackle-football-ban.html