I don't always carry a saw. But when I do, I choose Silky. Stay silky, my friends.
Ok, so I'm not the most interesting man in the world. In fact, I'm sort of grumpy.
<rant>
I think the issue of saws in the backcountry really, really depends on your local conditions. I've got kin who own and manage wood lots and they feel free to cut their stuff as they see fit but they get pretty touchy about people walking into their lands and cutting their stuff without permission. And it does happen with 4 wheelers and skiers looking to cut and brush out trails without permission.
And the public lands I hike on in New Hampshire (and once upon a time, in Sierra and Big Sur areas) had so much traffic that cutting out brush and stuff just hammered, I mean hammered the beautiful places. So grumpy ol' me grew weary of junk fire pits and deforested campsites long before bushcrafting became popular on the internet.
I'm not 100% opposed to campfires or the harvesting of wood in all cases but I'm pretty dang close to it in terms of the lands I hike on. I just don't want to see it and it's just not at all needed to be safe in the backcountry.
</rant>
If you do need to cut and the land management regime on the lands you go to allow it, I think the balance to be struck is between weight/portability in a backpack and functionality. For twig fires in many 3 season conditions, it's sufficient to rely on breaking small branches for a small comfort/cooking fire. A pocket knife suffices for shavings. IMO, a saw only comes into play if you need to cut logs thick enough to have dry centers (which then need to be split). The other place saws come in handy is making litters. I find the right balance to be the Silky Pocketboy. Out cuts small pocket tools like a Wave, big enough to handle small fire wood, not so big that it kills pack weight. I'll carry mine on winter ski tours but it's a luxury item and only under the right circumstances.
Here's a shot of a spring ski touring location. Nancy Brook is named for a young woman who fell into this brook in the winter while looking for her fiance who skipped town with the savings. She froze to death. I've had 2 partners fall into winter streams both around 0F and we've been able to handle the situations without needing to make fires or shelters.
Nancy Brook 2012 - Brook by
Pinnah, on Flickr