The point In my opinion, where it dosent make sense to try and reduce weight, is when your safety is compromised (not enough insulation/ protection from the elements, food.. ect.) It is important to go as light as possible, but still be prepared for the trip
some may argue, that the point is when comfort is sacrificed. for some this is more weight than others.
When I first joined this website, I was obsessed with reducing my pack weight. I even made a list of full skin out weight under 5lbs. I cut down, shaved off everything I could. I destroyed a few thing, and compromised the function of others.
I learned alot on how to reduce weight in these attempts, but also learned that it is not always worth it, and often, weight should not be my primary concern.
I strive now to build my gearlists as light as possible, taking into consideration, the specific needs of each individual trip. I sacrifice some comfort, but usually not function.
I usually carry 7-8lbs now compared to sub 5. but I feel much more prepared and comfortable because of it.
Take a look at the lists from Ryan Jordan's long trips, and Skurka's thru hikes. they usually range from 7-9 lbs base weight. but they are much more complete, and durable than sub 5 lb lists used on weekend trips...
Ultralight however is alot different than Ultrasimple. I still go sub 5 on occasion, but not because I cut the straps off all my gear so much that they no longer perform. Its because I just take the bare minimum, and dont cook.
But this is only on overnight trips. for multiday, I make sure I am prepared, with a blend of ultralight, durable, and functional gear pieces