If you make it slow, you cause the same issues - and then the neighborhood just says "well if it's FOUR generations that's not too bad, is it?" And because the people who don't get to move in later don't get a say... it gets worse forever.
It's insidious, but as long as you allow people to regulate how much housing their neighbors can produce, it always gets this bad eventually.
It’s self reinforcing. When demand is highest, building will be highest, and median unit size will increase more rapidly, allowing more building, allowing more units.
The pace is limited, but the URBAN output increases exponentially, which is exactly what we want.