The difference is between buying and asset and producing an asset. Even if RAM costs are falling, it can still be profitable to produce more RAM, as long as the costs are far enough below the eventual sales price.
It's entirely different if you're buying the housing already built; there's no productive activity, you're just a rentier and do not benefit at all from falling housing prices.
The differences in interests between an asset holder and a productive builder are night and day.
There is a difference but not in the way you think. Producing an asset is just buying other assets and labor. The difference with buying an asset is that a part of the assets you bought for production is illiquid for a term of the production. Generally you can only sell unfinished construction at a huge discount during most of the stages. So producing an asset is as same as buying an asset but with a lockout period, when you cannot sell.
> it can still be profitable to produce more RAM, as long as the costs are far enough below the eventual sales price.
Right... my point is that the costs are not far below the eventual sales price. That's why construction is slowing down.
And as mentioned several other times, it's actually not as simple as cost > sale price. It's margin > margin of alternative investments of similar scale and risk profile.