Again, just my observation but I think policymakers and the average citizen's perception of population growth way underestimates reality. Most people I'd bet think Mass hit peak population like 50 years ago. In reality over the century give or take the population has steadily increased by 1M people every 30 years. so 4M in 1930 to 5M in 1960 to 6M in 1990 to 7M by 2020. Yet the state land area isn't getting any bigger so you do the math.