probably the main negative consequence of any real estate regime change would be the destruction of incredible amounts of (paper) wealth. if you're going to reduce the market price of real estate, you're going to devalue one of the most foundational assets in the economy.

but, that's the point. you can't reduce real estate prices without reducing real estate prices.

Destruction of wealth would be bad since that would impact everyone (homeowner or not). I would opt for wealth transfer. Build more housing! Once the demand decreases the price will decrease. This also solves another fundamental problem: we pretend that there are X houses and X people that need a place to live. In reality there are more people than houses. Way more. Build more houses. Build high density housing. Stop treating housing like some sort of holy grail investment.