1) O(linear) > O(logarithmic), I'm going to assume you mean polynomial instead of logarithmic. Soooo I'm going to address that. Increasing density in markets with large amounts of single family zoning is not a linear solution. Yimby is about turning 2-dimensional single family neighborhoods into 3 dimensional multi family zoned neighborhoods by adding a heigh dimension to the equation. It is by definition a polynomial solution.