Over a year ago or so, I weighed my gear for the first time, made my first gear list, and posted it on here for feedback. I have to admit, my mind was blown. But I kept and open mind, tried some tips and advice, and was happy with the results. Problem was/is, I'm a humble grad student and father, and hence low on cash. This made me be very careful with buying gear, but I should add that I also happen to be naturally quite frugal and skeptical.
So at first, I just left more traditional gear at home. This included several of my prized bushcraft possessions like my awesome Fiskars axes. Then I repacked and scaled down. My FAK and hygiene kits got cut in half, and without any drawbacks either. Then finally when I got a small chunk of dough for myself, or for my birthday/x-mass, I replaced gear and got gear upgrades and alternatives. But before each and every purchase, I read lots of reviews, asked questions, read threads on these forums, etc.
Fast forward to the present. I just sent payment off for a custom Zpacks Zero, which is the finally piece of my gear library puzzle. This will be my 2 season SUL pack. I have everything I need for my 3 season UL needs, as well as my UL-LW winter needs.
There just comes a time when you don't need anymore stuff, and you are satisfied with what you have. Maybe this--meaning, lightweight backpacking in general--is about as good as it is going to get. Maybe we hit the glass ceiling, and there is little room for improvement or to experiment or explore. I am not advocating or suggesting that we all abandon the idea of pushing the envelope or giving up on progress to improve things, of course.
I was happy to see a thread on here vowing not to buy any gear in 2012. I was not yet ready to join in that vow, but now I am. Heck, unless anything breaks and/or needs replaced, I might not even buy anything in 2013 either.
Just thought I would add my 2 cents to give a perspective from someone that joined the club just last year, rather than 10 years ago, as many of you who read this and wrote replies to the whole "stagnation" thing.