Excellent point .... although I would argue that SUL is as much a thought process as it is a weight on a spreadsheet ...
Using this site, as well as a few other resources, has enabled me to reduce my baseweight from 35 pounds plus to 5.25 .... and 8 if I add back in a LOT of comfort ...
That's what the path to SUL means to me ... it enables me to be very comfortable in the backcountry and have a Total Packweight of about 20 lbs for a week long hike.
It also pushed me to learn a lot more about living in harmony with nature, how to thrive in the backcountry without dependence on a pack or the gear in the pack, and how to spend my time enjoying my hike/camping rather than fiddling with my gear.
This was a REVELATION for me .... and pushing for SUL enabled me to get that last 5 lbs out of my pack that was unneeded crappppp. Now pack weight is an informed choice for me ... I pick my gear, and my baseweight, depending on the conditions of the hike, and still stay well into the ultralight spectrum, even when preparing for adverse conditions.
It has also pushed me to take the long view on fitness, weight, etc. I have had back problems for 25 years, cumminating with three vertabra fused in 2009 .... for me, 5 lbs of packweight is the difference between having fun and agony with every step, however, it is improving over time ... something you have to be comfortable with in middle age ... you just don't bounce as well at 50 as you did at 20.
Keep it light brother .... and hike on ...