Light weight TTs: how do they hold up when boondocking?

Weight has very little to do with longevity. It's more based upon engineering and quality. For instance, pound for pound some aluminum alloys are stronger then steel, but way more expensive; titanium even more so. Plywood sheating vs. polyethylene sheeting; polyethylene has 1/3 the weight but 4 times the cost. So the moral of the story is, how is it constructed to make it lighter.