I followed the link above expecting to find something saying that people are coming to San Diego / SoCal vs leaving the area
The title of the article wasn’t what I expected:
“More are moving out of California than in”
and the text of the article seems to be saying exactly the opposite of what you are implying:
“For the fourth year in a row, more residents left the Golden State than moved here from other states, according to a report released Wednesday by the California Department of Finance.”
“During the last fiscal year, 135,173 more people moved out of California than moved in from other states. ”
not sure how you interpret this article as saying that people are moving into San Diego