I was wondering that, too. When I searched for preloved pieces, most of the hammock look like a puddle, even more than those on your attached picture… But then, when I watched all small hammock videos I could find on Youtube, most still had their shape, though many videos were about presenting pretty new bags…
I was hoping that newer ones were more sturdy? The ones I saw in the shop looked and feel pretty sturdy to me. The Kaonashi hammock which I finally was able to get, also has a pretty sturdy front and back piece. The wings have a supersoft leather though, where I could imagine that this part even gets softer with use… I hope that it won‘t collapse like the pictures in the second hand market, as I don‘t like the forward rolling of the front piece at all… Or is it that those hammocks were like really abused?
Perhaps we have someone here who has had a hammock for a longer time and could describe how theirs have been holding up?
For now I store my hammock open (in the long form) with paper in it, so that most pieces are not smashed or folded in anyway. Until perhaps anybody else has a better suggestion.