The intense Torah community of Lakewood can be looked upon as the modern day equivalent of the Shevet Levi (Levite tribe).
However, the Shevet Levi was not given the “spiritual luxury” of having a pure isolated community. Instaed Moshe broke them up into 48 small towns spread out among the other tribes. If you take Moshe’s earlier census of 22,000 Levites and divide into 48 cities that gives less than 500 Levites per city.