On campus housing has grown, but off campus housing is choice for most students. Here is a compilation of students housing around UTSA:
There are only 6 residential areas (including 3 phases of University Oaks). 2 of them (Chap and Laurel) are brand new. At least 11 of the complexes on that map didn't exist before 2000. The school is planning at least 3 new on-campus housing complexes for a total capacity of 5,500 students living on campus.
Sure only about 3,700 live on campus, but another 6,000 live within walking distance in other apartments.