I use Aquatabs for water purification. Other then making tea/coffee/food, I can't recall the last time I boiled water exclusively for drinking water. I would of course, boil water in a survival situation if I had to.
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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