Do I really need separate glasses for red, white, and sparkling wine?

The consensus across the reviewers we read is no, not for most people. Independent testing at nytimes.com and the universal-glass methodology at seriouseats.com both point to a single well-shaped universal glass (such as the Gabriel-Glas StandArt or a Schott/Zwiesel Tritan stem) handling reds, whites, and bubbles capably. Enthusiasts on r/wine still favor dedicated Burgundy/Pinot and Bordeaux shapes for special bottles, but agree a good universal covers daily drinking.