One of the first things I did when these became popular back in 1992, I banned them from the boat (the hovercraft I was responsible for maintaining). The mechanics and electricians tried to use them for EVERYTHING. They left burrs on every damn shaft they tried to hold, rounded off the corners of every bolt they tried to loosen, stretched and tore every piece of insulation they tried to strip, wallowed out screw slots, etc. They created more problems than you can imagine. There is a correct tool for every job, and "multi-tools" are never the right tool, IMO. Space is not so tight as to require I start leaving tools behind (even in my jeep). You probably don't even want to see the tool set I took on the snow run in Jerome last year.....Scott saw about 1/2 of it when we were changing out the winch on the front of his jeep before the trip....
I own one "multi-tool"...a leatherman squirt (midget version of the leatherman). The only reason I have it is because I found it laying on top of a sand dune in death valley a few years ago. It was brand new then (only one or two scratches on the finish....the blades/tools appear unused), it looks just the same today. I keep it around because I keep telling myself that it will come in handy when backpacking....but in the end I just carry the tools I might need (knife, needle nose pliers--for pulling cholla spines out of the dog, zip ties, etc).