I think it is fair to say that in terms of BPL's overall membership, both SUL and Hunting out of a Pack (HOOAP?) are both niche interests: Apples & Oranges.
But given that they are both on BPL they do have a commonality in the interest of shaving weight in order to enjoy their pursuits more ... but apparently not all realize those pursuits are different. (And that difference will inevitably result in different gear selections)
SUL is probably the bigger niche here (or at least has seen the most print on how "low can you go", in addition to having its own forum) ... so it likely there are more practitioners with that mind-set, here at BPL.
If the HOOAP folks had their own BPL forum (and not be hidden in the "Other Activities" forum), then the SUL folks would have an advance warning on content they are reading if they decide to click into it ... no Apples to Oranges confusion.
In reference to the post above for needing a big load hauler for some epic remote off-trail Alaskan adventure (non-hunting trip): there are many possible choices that are significantly lighter than the pack reviewed. For one possibility, we can look to Andrew Skurka's Alaska-Yukon Expedition where he decided to use an ULA Epic pack which with the 70 Liter (!!) dry bag he used, weighs 43.4 oz. (= 40 oz for the pack + 3.4 oz for the dry bag: quite a bit lighter that the the 58.6 oz listed for the pack in this review ... and even though it is a breakthrough pack for backpack hunting, as David himself wrote his review: "The utility of the Evolution for the non-hunting backpacker is a bit less clear" ...)
Also in reference to the post above "SUL has it place: on a boring, well-trodden, sanitized trail" (*smile* snarkiness aside, even though being snarky is admonished earlier in that post). One only has to look to John Muir himself as an excellent counterexample. Almost all of his ramblings were off trail (as were no formal trails)
As for my self, I haven't gone on a backpack hunting trip - but respect those that do and their way of connecting to the outdoors.
... and when I do occasionally go SUL I'm either in a friendly, fun competition with friends, or going on a cross country Sierra trip where I want to be fast & nimble.
"The more you know, the less you need" - Yvon Chouinard
HYOH. (which I realize might now, have two meanings: Hike Your Own Hike, and Hike Your Own Hunt ;-)