A lot of media players have a audio 'normalizer' function that can be enabled that achieves the same desired goal - trying to 'even out' volume variances in backing tracks. Even to the point of analysing a playlist and applying a specific volume normalization. That might be an interesting feature to have in ST.
It's definitely not something I would use as I create my band's backing tracks from scratch and they vary in volume very deliberately depending on the song, and I master them accoringly and do a lot of work in rehearsal to achieve that balance. But I could see people who use ST differently using this type of feature.