Ironically NYC used to have an absolute ton. In fact a number of the underground lines we have today were direct replacements for the overhead lines, which were

Ironically NYC used to have an absolute ton. In fact a number of the underground lines we have today were direct replacements for the overhead lines, which were unsightly and very noisy. These days I have to imagine we could create something much quieter but very few people are going to advocate for their sunlight to be blocked by an overhead train line.