Theres a valid performance and monetary reason for many gear items. A Mora knife for your first survival seminar until you can afford and know what knife will be your primary blade is an example. Then there is the 'gee wizz' stuff that seems to hold an advantage such as shaking, solar or cranking power sources. 3 minutes give you the advantage of seeing your spaceblanket shred in winds better faced with a cheap surplus blanket and a old D cell flashlight at minimum.