Depends. I probably could get by fine with just a Vnox Classic most of the time, but always carry a Spyderco Delica. Was wishing for the saw on the Vnox Hiker, that I usually consider dead weight, when I lost a trekking pole doing some class 5 "scrambling" climbing around a waterfall that flows into a hole. Had to cut a limb to use as a trekking pole/support for my Tarptent Notch.
Where appropriate in cold weather, I sometimes bring a folding saw for cutting firewood, and a fixed blade comes in handy for splitting it if all the small stuff has been picked over already. Bought a Mora Companion HD this spring that I'll carry instead of a heavier knife on the rare occasions I bring the saw. Since my weekly trips in winter are only 1-3 nights, pack weight's already minimal, and the extra 14.4oz that combo weighs isn't noticeable. The ability to have a decent sized fire prepped in going in just minutes is, though, because if it was too time consuming I wouldn't bother. Fire can be fun to play with when sunset comes early...