Even after revolution it's not happening for many, many years. Replace the police yeah, but it's not really gonna be an abolition. Police abolition also means penal code abolition, justice system abolition etc, stuff that communists always assigned to the "higher stage of communism". If you're the zapatistas you can do it because of how unified and tightly knit they are and the peculiarities of their situation and way of life, but in a highly advanced, urbanised and heterogeneous society it's not really so simple.