And here we get into details. The problem with buses is their rubber tires. The awesome thing about buses is also their rubber tires. Need to move the bus line around? No need to run new tracks, just have the driver drive a different route. But all the negativities to buses aren't small details. Because you can just up and move the bus route, it means that the cafe owner right by the stop is at the mercy of the city planning department to exist, which leads to obvious power issues aka corruption. After everything else is greenified, rubber tires are the biggest source of pylori pollution from buses.