15% is ridiculous. If inflation had run at 15% the last ten years, then prices should be about quadruple what they were in 1997. Are rents 4 times higher than 1997? Is your grocery bill 4 times higher? Hell, even gas isn’t 4 times higher.
I am a big time housing bear, but I really don’t get the “CPI-is-nonsense-inflation-is-really-super-high” stuff that a lot of people here seem to believe in.