Extended Cushion Ideas

Hoppers: Sitting on a cushion above a hopper removes items from your inventory.

Comparators: Cushions send a signal to comparators whenever someone sits on them.

Ender Chests: Allow cushions to be placed on Ender Chests, just like they can be placed on regular chests.

Smithing Table + Saddles: Use a Smithing Table to combine saddles and cushions to create customizable saddles.

Consider this one: Cushions cannot be destroyed if a piston moves a slime block or honey block with a cushion on top.

Cushion Sounds: Cushion sounds shouldn't trigger Sculk Sensors, since they're made of wool, which also doesn't trigger them.