Serving tea sandwiches is just one way to use a tiered serving piece for entertaining. New or vintage pieces can add drama and heighth to your buffet or appetizer arrangement: think more delicious things in less square footage. Plus, tiered serving pieces can make smaller treats, appetizers and canapés more accessible to guests and creates a welcoming presentation. No surprise, I have several tiered serving pieces in both ceramic and metal, some new and others vintage. I use them frequently for sweet things as well as starters and think you should have at least one in the batterie.
This stackable wooden one from Merchant No. 4 is perfect for cheese or charcuterie.
This glass and metal example from Crate and Barrel is simple, but the materials allow it to go with any type of serving pieces.