I know most of you don't care about these types of subjects at all, but
parking minimums make it illegal to build urban hellholes even in urban hellholes. You don't need to have giant skyscrapers to have population density sufficient to have nice walkable neighborhoods, but you do need to reduce things like required setbacks and parking minimums. My urban hellhole isn't too bad on this issue, but still larger new developments (5+ units) generally require more parking than whatever it is they're replacing. It shouldn't be illegal to build the city in the city, but it is.