Just maybe. Whistle and horn sounds seem to be a huge buying factor for LEGACY engines nowadays, and most of the people back in 2016 weren't happy with the sound of those GS-4's, not unlike how some were displeased with the whistle change on the 2015 UP FEF-3's (among other things).
I don't know if it impacted how well either of those engines sold 4-5 years ago, but I imagine having the 2008 whistle on the new Vision GS series locomotives might help.