>>963886firs, your ltwk (and mine, for that matter) does fall in the $135+ category, same as Joe's knives.
Second, context does matter. For one, OP proposed a 5mm thick falkniven, which is needlessly overbuilt.
Third - when you use a knife for an extended period of time, you will come to appreciate having a 2.5 ounce, 3'' blade with a 3/32'' spine, over a 5'', 3/16'' thick knife - the small one is just that much more handy to use.
But fine - let's say we are comparing two knives of a similar size, something like a 3/16'' thick Spartan Blades Enyo (s35vn, saber grind) that costs 150 bucks, versus a 25 dollar, 1/16'' thick trade knife (pic related).
I guarantee you'll notice a difference very quickly.
the down and dirty of it is that spine thickness doesn't matter much when cutting flexible material like clamshell packaging, packing tape (opening packages is mostly just cutting the tape, not the actual cardboard box), "soft" vegetables and meat, or making feathers (and removing material from wood in general), since the primary factor here is edge keenness.
Where geometry makes a big difference, is cutting through rigid, and/or brittle materials, like apples/carrots, more intricate woodcarving, etc.
>surely not as much better as you'd have everyone believethat's true autism speaking. The ÿoutube stamp of aproval"most knives get after batoning some sticks of varying thickness and making some feathersticks (and striking a ferro rod) is hardly a measure of a good knife.