Admittedly a little early on Monday morning for this... but discovered an added benefit to the coupe glass, that is the slight effervesence of the champ'poo tickles your nose as you tilt the glass to drink. Unless your soul is completely crushed it has to bring a little smile to your face.
NotCot has an potted history of champagne glasses
here. About the coupe they note;
Then appears the “coupe” (or glass) at the beginning of the 1830s, a new glass first used during buffets because of its easy using for caterers and waiters. The “coupe” has a different appeal from one culture to another: it is elegant for British people and is popular in Russia because of its ability to contain more champagne...
NotCot has an potted history of champagne glasses here. About the coupe they note;