I myself have good quality waders and have purchased Simms for some time now.
That being said, I feel that how long a pair of waders lasts has a lot to do with "body type" and how they fit.
My Simms have been good, and when I do puncture them with branches, etc, I do repair them and that is on me.
One thing I have noted is different body types impact the durability of waders.
For me, I am a bigger guy, and do do a lot of travel.
I have purchased and sized my waders well.
Yet, my well worn, 7 year old? Simms G3 Special editions came to have issues which I am going to blame on my "body type"
One was related to the customized feet.
They felt good on and the ergonomical design was nice.
Yet, my feet are a bit wider, and my legs a bit muscular and thicker.
This resulted in a tighter fit and more pulling and tugging when the feet came off.
This seemed to result in the seam tape inside coming off, and some slow leaks in the feet.
Neoprene feet have been pulled off and new ones put on. They feel nice and fit well.
Another issue I found is due to the seams, the inner thighs and the crotch area would fit in a way that there has been friction while walking.
As a result, some areas the outer layer has worn through and started to leak.
Once again, Simms was great and when sent in, put on high quality patches inside the waders that are holding up great.
At the same time, this area is still continuing to run and the gortex wear thin. This will lead to future failure.
As I said, they have been great. But, I think different guys fit waders in different ways, and depending on the cut and design of certain brands, this can work to promote failure and pre-mature wear.
Just some thoughts.
Dano