Years ago, spent 2 days up a mountain waiting out a bad storm. It did not take long to find out that the 10 essentials is not adequate enough gear for all circumstances.

Skip forward some years and after spending most of my life outdoors whether it be mountain climbing, short and long distance hiking, camping, fishing etc, my interest in outdoor survival gear has grown exponentially to fit whatever venture I was/am involved in to the point of having almost too much survival gear as evidenced by the growing pile in the living room corner..
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock