My thoughts:
Colored glass works as good as clear glass, time has proven that. Beauty, or good looks, is in the eye of the beholder. Plastic counter tops and furniture were popular in the 1950’s and 1960’s. Wood countertops and furniture were popular in the 1980’s and 1990’s. I guess bows followed the same trend. While I was growing up my mother told me, keep my skinny ties; “they will be popular again in ten to twenty years and you won’t have to buy new ones”. She was right. Might the same thing be happening with bows?
Personally, I prefer the look of wood, even if it is covered with glass, and buy and make all my glass bows with clear glass. However, my all time favorite bow to shoot was made in the 1950’s, has brown glass on the back and green glass on the belly.