Why was the East Palestine train so long

The February derailment in East Palestine, Ohio, was caused by a 1.7-mile-long train, which is longer than half the width of Manhattan. This suggests that railroad companies have been cutting costs by putting more cars on fewer trains, thus reducing the workforce by 30% and increasing their profit margins in the past decade. Furthermore, the region that the train passed through employed five maintenance specialists to inspect and maintain hot box detectors in 2020, but now there are none. This is an issue because the train had a fiery axle before it passed the detector, but the crew didn’t get an alert until 20 miles later.