Look up Case-Shiller home price index. In most markets, home values are much higher than they were in mid 2000's.
[1] https://wolfstreet.com/2021/07/27/most-splendid-housing-bubb...
[1] https://wolfstreet.com/2021/07/27/most-splendid-housing-bubb...
The affordability is determined by monthly payments, which are a function of home price and interest rates. If home prices are up but interest rates are way, way down (which is currently the case) it can be possible that houses are still more affordable.
You have to consider home costs as down payment + monthly mortgage payment (+ taxes if you're getting specific) to understand affordability.