I have cut a good bit of wire with my Leatherman Wave.
On the electrical side it seems to handle everything up to #8 copper and aluminum easily enough without damage.
Standard #16 soft iron and galvanized iron tie wire is easily handled even when doubled.
Standard steel and aluminum chain-link fencing is about as large as it goes comfortably for the several cuts that can be necessary. It isn't suitable for every-day or production work, extended use would spring the jaws, but I've cut my way through a couple of fences and it is still kicking.
Thinner but tougher high-tension barbed wire has to be handled using the shearing notch in the cutter nearest the pivot and such cutting take a touch longer so it isn't suitable for production work but for incidental and occasional use it handles it well enough. I've cut two or three double strand fences since getting them and no issues.
The one common 'wire' I have yet to try the Leatherman on is razor wire. Typically this is hardened stainless steel tape that defies, or at least resists, most cutters. The trick is to fold it and work it back and forth letting metal fatigue work for you. A piece of heavy cloth, heavy leather gloves if you have them, are pretty important. Pliers are as often good as most wire cutters that haven't been designed for the job. Normal aviation shears work but unless they are high end units that are very hard with good steel they dull quickly.
For the sort of incidental use a hiker might need the Leatherman Wave seems to work well enough.