What else is? Certainly neither glass nor metal, since they dull knives way to fast.

The lignin in wood is also extremely effective at dulling knives.

The cutting bits of woodworking tools pass through more wood in a minute than a knife does over its entire lifetime.

I have a composite (???) cutting board, the surface kinda feels like it's papery / fibrous something when it's wet and some of the bits flake off. But it's dishwasher safe.

Instead of wood _or_ plastic, you have wood _and_ plastic in one board! (Or rather, paper mixed with some sort of formaldehyde resin)

What else do you use as a cutting board then? Slate? Metal?