A Utility knife is a kitchen knife that is midway in size between a Chef's knife and a Paring knife.

Although I own a Utility knife, I don't believe that I have ever used it except when my Chef's knife was unavailable. I took a look around to see what uses I might have missed. Wikipedia says (without citation) that this knife is "derided as filler for knife sets" which squares with my experience. A few links call this type of knife a Sandwich knife because it is, ostensibly, good for cutting sandwich cheese and meat. Here's what one source says:

The utility knife is good for cutting larger vegetables and sandwich meats that are not large enough for a chef's knife

I have a hard time swallowing this because, whether I'm chopping very small items, say Kaffir lime leaves, or large vegetables, say an aubergine, the Chef's knife still feels most comfortable in my hand.

Can someone help me picture a legitimate use for this knife where a Chef's knife or Paring knife wouldn't do better?