You should note that LA County, Orange County, Cook County (Chicago) and two New York counties are even higher on the list. The quote that caught my eye was
“LA has had this profile for 20 years”
Doesn’t seem to have depressed their RE prices too much. San Diego has grown into a more mature metro area and a lot of the people leaving have just been priced out just like in Manhattan, the Westside of LA, Near North areas of Chicago and you’ll see that here in Coastal areas. It started in La Jolla and is slowly heading north. Oceanside will see a huge push to the east over the next 10 years.