G.T. wrote, "@Justin
Good idea, but I am afraid that it would not help that much. Abrasion happens from the inside and the outside."
Yeah, but i would think it would be worse from the outside. It might add too much weight (for your use and consideration), but a silnylon pack liner (or even the much lighter fabrics like M50, M90, the Nobul's, etc), plus patches on outside combined might work. That's at least what i would do if i was trying to correct this problem, despite the weight penalty. I tend to the frugal, and since i have a GoLite Jam pack which i'm mostly saving for hard and constant use, i may try this very methodology since it's easy and cheap to make sacks. The sewing it on on the outside would be difficult, if not impossible, with my machine, but i can always do hand sewing too, and maybe a little silicone adhesive might help too.
If 4 to 7 oz made the difference between 1 year of hard pack use, changed to 3 or 4 years, well at least count me in.
Thank you for making me think about this issue more thoroughly, as i suspect it will be a big concern for me for the nearish future.