This is a great plot to help one decide where to retire to if one is interested in the East Coast.
I retired to Florida when it was affordable. That’s definitely no longer the case. Delaware looks interesting with no state taxes. I may look into it sometime.
My father was a geology major in college, so when he retired he bought the US Geologic Survey earthquake maps, trying to stay far away from southern California's many earthquake faults. He settled on Oceanside, halfway between LA and SD.