Several other cities did have elevated railways. In New York City, on Manhattan. there were elevated railways along Second, Third, Sixth and Ninth avenues. Mayor Fiorello La Guardia thought they were a blight and many residents complained how noisy they were. As the New York City subway system expanded, these elevated railways began to be shut down. The Second Ave. El in 1942, Third Ave El in 1955, Sixth Ave El in 1938 and the Ninth Ave El in 1942. The first three that were shut down were quickly torn down and their scrap metal was used in the war effort.
Boston had two elevated railways that lasted much longer. The Washington Street Orange Line lasted until 1987, when a new Orange Line was opened a few blocks to the west, on land that had been cleared for the aborted Southwest expressway. The elevated portion of the Green Line along Causeway street lasted until 2004.
In 1926, the New York Central Railroad elevated its mainline through Syracuse New York. When the Delaware Lackawana & Western electrified its suburban train service from Hoboken New Jersey, it elevated its tracks through Newark NJ in 1931. The Pennsylvania Railroad elevated its tracks through Newark back in 1914. The New York, New Haven and Hartford Railroad elevated its tracks through Bridgeport Connecticut in 1907. Back in the 1880s, when the Pennsylvania railroad built its Broad Street station in Philadelphia, it also built an elevated railroad to this new station. In was a solid stone viaduct, with narrow openings, every three blocks. The residents of Philadelphia hated it and called it the "Great Wall of China". In 1930, The Pennsylvania railroad opened a new Suburban Station, across the street from Broad Street Station. It used a subway to let electrified trains access the Suburban station and it tore down its Great Wall of China.
Sources: "When Steam Railroads Electrified" by William Middleton
"The Pennsylvania Railroad" by Don Ball jr
"Trackside in the Northeast with Vincent Purn and John Knauff" by Kevin Holland and Robert Yanosey

Vancouver still uses a predominantly elevated system. It's really only the one line that is mostly underground. It's actually a pretty large network for a city of its size. Completely automated, as well.

This is a question about current practice and therefore not suitable for this history sub.