Yes, you can pull purchases forward by opening the mortgage market to people who wouldn’t have been able to buy until later in their lives, hisorically-speaking.
I bought in early 1998, and was not competing with other buyers. San Diego was not “unknown” back then. “The rich” have known about San Diego for a long time. La Jolla, Del Mar, Carlsbad (esp. La Costa area), RSF, etc. have been known to the BIG money crowd for many decades.