Why did the CCTV gala pronounce "乡音无改鬓毛衰" as shuāi instead of cuī, unlike what we learned before, and how should this change be viewed?

央视晚会将「乡音无改鬓毛衰」读 shuāi 而非 cuī，为什么和早年学的不一样了？如何看待这一变化？

A public trend signal observed across 1 source.