When you're at your friends' house, your pocket knife is likely to be a better meat cutter than whatever butter knife is in their kitchen.
That pretty much sums it up for me.
I have a nice small block of Victorinox/Forschner knives that I keep very sharp. It's easier to reach over and take out a Victorinox paring knife than use my pocket knife. My go-to kitchen knife is a 7 inch Victorinox chefs knife that nobody else touches.
However, when we're over Karens sisters house, and we're doing a BBQ, my pocket knife gets used a lot. For some reason Diane will not keep anything but cheap dull knives, so it falls to me to do any thin slicing and dicing. The pocket knife of the day is put into action. I've discovered by trial and error, a sodbuster makes a decent kitchen knife. When over Diane and Roy's house, I've actually snuck out front and sharpened up a large dull butcher knife on the front steps. It actually worked well.