My water vessel weakened at a seam. I don't know how I could have prevented it, other than replacing it earlier. There wasn't a lot of wear.
In regards to the jacket, I think the answer to why it failed falls somewhere between poor quality and extreme use. Wearing the jacket all day as a wind layer, wearing it to bed as barrier against wet clothing that I was drying out, and then wearing it around camp means during this particular trip, it saw a lot of use. I also often used it as a raincoat when I wasn't camping, and I routinely biked in it all winter as a windbreak.
So, for me, adding 5 ounces for a durable raincoat is a no-brainer. I beat the daylights out of rain gear, so a membrane piece instead of a thin sheet of nylon coated in DWR is a good upgrade.
I kind of understand the point about how far it is to the trailhead, but in that case, I want to err on the side of caution. It is not acceptable to me for my raincoat to disintegrate because I very well could be two days from my car, or more. I need something stronger. I know I have my brain- and I'm completely sure I'd figure something out with a sleeping bag and several other layers that would get me back home alive, but if I can skip making that kind of decision by bringing durable rain gear, that's a good use of my brain as well.
Because my sleeping bag sees very little abuse, I'm happy to go ultralight there. Running shorts, sunglasses, a down jacket for camp- I can and will shed ounces by using extra-gossamer materials.
But honestly, maybe it's just me; I see no difference in 10lbs versus 15lbs, and that extra 5lbs can mean more durable materials for your tent, pack, rain gear, and shoes. I could go to 10lbs base weight, but 15lbs feels only slightly heavier and can mean a huge difference in what you're able to do. Even if I was two days from the trailhead, if my gear is ready for 100 miles of travel or more, I stand a higher chance of enjoying myself and my overall safety increases.
Just my 2 cents!