> they aren't - investment is supposed to increase the efficiency of production, thus increasing the availability of said product. The issue here is that land is scarce, and can be made more scarce by various laws. Building/construction costs have decreased somewhat, but the major cost is the land, and lack of density leads to lower supply.

You may have misunderstood, I'm suggesting it's not possible for something to remain perpetually affordable and be a good investment. A good investment becomes less affordable over time. A bad investment does the opposite.

For instance, nobody complains about how unaffordable AAPL shares are do they? That wouldn't make a lick of sense because that's the desired outcome. That's why you invest.

If you want housing to be affordable you don't invest, you buy. Like a car.