JonnyJHad this model for the last year, and I've since stopped carrying my 3" folder. Always comes in handy when you dont have a knife for random things like opening plastic containers and the sort. You never know when you'll be in a friends yard and need to cut something. It's seen a good bit of use IME.
JonnyJI have the black version on my desk, we get a lot of shipments here and I use it as a box opener. A lot of people who carry larger blades work in office settings where it is...frowned upon to flick open a 4" tactical blade. Members have started polls like "Cool knife that won't scare my office mates," and I think that is about the best explanation of why people keep these around. Not to mention the fact that it's legal to carry in almost every country and fits in almost any pocket. Also, cardboard and tape will make blades dull and sticky real fast.
JonnyJI have a couple of these and they get no real use. I find a small fixed blade neck knife is more convenient. Still, I tend to carry one of these. Maybe, it will end out on a key ring.