Plenty of MIT people stay in the same room for 2-4 years. (usually freshmen were in one room sometimes with a roommate, then if you made compromises you could get a single for years 2 to n (n = 4 or 5 I guess)
It really depends on the specific dorm. IIRC you could easily have the same room for 4 years there, more easily than some other dorms. It (and Random where I stayed) tend to have more of a culture of making changes to the rooms and building - like making murals.