They're asking if there's an end game. If the single family homes get rezoned to three storey blocks, does that just become 10-storey towers and then arcologies, each more efficient than the other.
Maybe the answer is that the current single family home is an arbitrary point on the scale too, and should just be evaluated on merits for current and future needs.
Maybe the answer is that the current single family home is an arbitrary point on the scale too, and should just be evaluated on merits for current and future needs.