I'm not sure anyone has specifically addressed this yet, so I'll add my thoughts:
Availability. When I joined the Scouts c2001 and bought my first knife, it was the brand the local outdoor shops stocked.
Value- price for the quality was and still is incredible.
Quality- mine has survived an amazing amount of abuse when I've been too lazy to go and fetch proper tools, it was even used as a hammer during an emergency roadside vehicle repair hundreds of miles from home in winter when breakdown services were on a 72-hour delay to schedules due to snow.
Warranty- Lifetime, and if you abuse it they will repair or replace for a small fee (£10/15).
Material- Stainless blades are perfectly adequate and maintenance free. High-tech steels are great for internet/armchair enthusiasts, but make an insignificant difference in every day real world use in my experience (and I've made a living using everything from tiny intricate carving gouges to knocking out building timbers with 8lb hewing axes)
I've had that Victorinox Huntsman about my person ever since until recently, and spent as much (if not more) of my life living/working/playing outdoors as most outdoorsy people. There have only been a couple of occasions in all that time when I'd have been better off with a fixed blade knife.
I'm not really interested in knives, to me it's a tool like a tape measure or square. I've forged a few fixed blade knives but every time folk have offered money for them in a matter of a few weeks, and I've always sold them on the spot, thinking 'I can make another if I feel the need' but haven't really felt the need.
Having a variety of tools always about the person is great and I regularly used both blades, the screwdrivers on the end of the can/bottle opener, the scissors and the saw, the hook very occasionally. Tweezers-great. Toothpick- sometimes useful for odd uses. It saves a lot of time going to find proper tools. I owned a Leatherman thingy once and never got on with it, too bulky/heavy, if I'm planning to do any sort of practical task I'll take proper tools with me. The Victorinox is just the right balance for unexpected things and odd jobs to save time getting proper tools out.
Some of the other tools on board I could live without (stupid awl thing for doing horrendous bodges, corkscrew).
Having said all that, at the moment, I'm trying a Super Tinker instead. It's thinner and lighter, and I don't really need a saw at the moment (I used to do a lot of heritage fruit tree restoration/pruning, and the saw was ideal for some tricky cuts and the knife blade good for cleaning up any rough cuts). Philips screwdriver instead of a corkscrew is a bonus.