I have a couple of pairs of 501s that I've been dragging around the world for a couple of decades. The nice thing about the buttons on the fly is that if you are a bit too fat to fasten them all they way to the top a loose shirt covers the bulge. I like my levis.
It takes some time and some washing to soften them up and make them comfy.
Some people are not so patient. There is a huge market for blue jeans that look worn.
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