market churn (which is in part informed by time) matter with affordability.

I don’t propose what you’re saying either. A land value tax is more than sufficient, by any research I’ve seen on this topic. It doesn’t in any sense mean what you’re saying here. Only that under utilized land (usually classified as unbuilt or vacant) is taxed more heavily. Thats one facet. The other is that it shifts the property tax off of building values and onto land values can make both buildings and land less expensive. This has a knock off affect of reducing the value of real estate holdings to varying degrees in terms of value in the short term but stabilizes in the medium and long term.

That would be better in my view but as it exists today, we instead have to rely on building more housing or putting more existing supply in the market, neither of which in broad strokes are happening in a way that keeps pace with demand unfortunately

Also: not everyone who can afford to buy a home can buy a home built from scratch. There are different classes of home buyers and the vast majority aren’t moving into custom homes like that. Its unreasonable to think that it’s common place in aggregate