I briefly flirted with SUL with weekend trips etc. It was a fun and interesting fling while it lasted, but generally speaking i've become more interested in durability over saving weight–mostly because of my conscience and "eco" oriented side, but also my cheap, thrifty side.
There are times when durability and SUL can go together, but usually that requires a lot of money. Sure, who wouldn't love an all Dyneema or all Spectra pack? But i can't afford it. I would also love an all Spectra or Dyneema Windjacket, but they don't exist and MYOG on such an item is next to impossible.
Plus, i'm not all that interested in getting caught up in labels and boundaries. This doesn't mean that i don't look for creative ways to save more weight, or come up with better solutions for things or add flexibility to my systems. I still do, and like thinking about new ideas. I enjoy the creative act involved.
The only time i would seriously start focusing on SUL again, is if i was planning a Thru type Hike. I wouldn't necessarily go SUL, but i would use techniques and ideas from same to drop more weight provided i could do so cheaply and without sacrificing much durability.
Now that i work at a school again, i could possibly do a long hike again over the summer. Just need to find a cooler and/or drier place to go. Not a fan of the AT in summer.