What makes Round 2 by The Stylistics notable?

'Round 2' features the hit single "I'm Stone in Love With You," which reached No. 5 on the Billboard Hot 100. The album's lush production and emotional delivery helped it become a staple of 1970s R&B, influencing countless artists and contributing to the genre's evolution during this era. Released in October 1972, 'Round 2' was The Stylistics' second album, following their self-titled debut. At this point in their career, the group was gaining popularity with their rich vocal arrangements and distinctive sound, solidifying their place in the Philadelphia soul scene.