I have had some good luck with my wire saw. Some are garbage, but the ones I found work well. They aren't a replacement for a good full sized saw, but they have always done the work that I have needed them to do. They are light and take up very little space. Their usefullness will totally be based on what the user needs are, not to mention how resourceful and inventive the user is. Personally, would I survive without it? Of course. Have I benefitted from having one with me? Yes. Do I use it every time I go out? No.

A person survives, tools just make it easier.