[alistairSH]

Huh. I've had a cheese slicer at home forever (Scottish-American).

It mostly gets used at dinner parties, when we buy nicer cheeses; inexpensive cheese is almost all pre-sliced in the US. Same holds true for my parents.

[Symbiote]

Most cheese sold in Britain is not sliced, but most people use an ordinary knife for slicing it.

I'd guess grated cheese outsells sliced cheese.