I tend to think this is a fad, which may last a decade or two. Then, the high schoolers will see Grandad and Granmas Cap and Gown pic’s online, and become envious, or at least curious.
We all had one color of robe way back then. This is the first I’ve seen colors by sex. The only color difference we had were sashes and tassels representing letters in sports, or academic/attendance/volunteer honors.
Looking back, our tradition honored accomplishment and hard work, not biology.
Yay, us.