This question is a bit heretical but it's important: When we share items, does the increased wear & tear mean that the item wears out beyond repair and must be replaced sooner than if we didn't share it. Let's  say, for example, my neighbor and I share a washing machine: Instead of that machine doing 1 load of week, it now does 2. Won't it wear out twice as fast? And, if so, is there an environmental/financial benefit to sharing anyway?