@David Faulkner and @Matt R. let's put aside personal preferences for a moment and let the number talk. I will take a long term view and I will compare San Diego, America's Finest City with Kansas City, the City of Fountains. I would be interested in your view on these numbers.
Let's assume that some areas of San Diego and Kansas City were at same home value 50 years ago, and all overperformance came in the last 50 years. This assumption is favaorable to the appreciation camp.This implies a 3.2% appreciation differential. You would end up with zillow home price index at 575k in San Diego and 120k in KC.
Conclusion 1: net rent yield needs to be 3.1% higher in KC to make sense vs San Diego
The law of compounding is such that a 7% net rent differential will favour KC against San Diego even if the price index was to climb to 6mln (inflation adjusted) in the next 50 years. The lesson is: it should be very hard for appreciation to keep up against a substantial net rent yield differential.
Now let's look at why there was might have been such a stellar 3.1% in America's Finest City long term appreciation and where this number is going to be.
Appreciation Effect 1 - Rising Inequality and Ricardian Rent less than +1%
Living in San Diego gives access to higher paying jobs, and space there is very limited. So prices go up.
Looking at US census data, I see that wage growth of the top 5% of the US population was never more than 1% higher than the bottom 20% since 1967. So even assuming that San Diego was inhabited by the top 5% US income only (median income at 160k), only 1% would be explained,
Appreciation Effect 2 - mortgage affordability +2.7% since 2000, +3% since 1981
Since 1981 to now mortgage rates have gone from 18% to 4%, this contributes an annual growth 3% per year to the mortgage can afford. The number since 2000 is from 8.5% to 4% contributing 2.7% .
Conclusion 2: Comparative Annual Appreciation of CA to MO go back below 1%
recent price appreciation in California from 1981 is due to mortgage rate going down 14%, and that it can not continue as mortgage rates will not got negative.
In case mortgage rates go up, some of the previous excess appreciation (compared to the long term rate of 1%) may have to be forfeited (While nominal depreciation is unlikely because rich people do not like to sell at a loss, we may see stagnant nominal prices until affordability is reestablished).