what exactly are the advantages over a collapsible buck saw for my proposed usage?
However, I see a number of faults:
1) There's the matter of your hand position being in a stabbing position rather than a punching one, which seems a lot less natural for a sawing motion and seems like it would fatigue you more easily if you're planning on doing a good bit of wood processing.
2) The folding mechanism seems like it would be more prone to breakage than a buck-saws.
3) Longer models that can cut 8-10" logs are QUITE spendy.
4) I've looked around and it seems like replacement blades for laplanders and silkies are 50-75% the cost of a whole new unit! And that's before shipping, which will be a necessary cost since they'd be impossible to find locally... whereas bucksaw blades are much cheaper and can be purchased from hardware stores.
I can see a folding saw being nice and handy for cutting a few 4-5" logs and doing some other bushcraft chores, but for sectioning out serious firewood, it's not seeming like a very viable option to me...