What makes Old Train by The Seldom Scene notable?

'Old Train' is significant for its role in popularizing progressive bluegrass, influencing both established artists and newcomers. The album received favorable reviews and helped establish The Seldom Scene as key players in the genre, contributing to the evolution of bluegrass music through its inclusion of contemporary themes and sounds. Released in 1974, 'Old Train' marked The Seldom Scene's debut album during a time when the band was forging its identity in the burgeoning progressive bluegrass scene. Prior to this, they had gained a following through local performances, but this album represented their first foray into recorded music, showcasing their innovative take on bluegrass.