I made one in the late 70's (my first) that I have used constantly. First the "iffy" fabrics wore out and I replaced them. Now even the good quality cotton calicos are starting to wear out. And I do NOT machine wash or dry it.
I have seen much older quilts in better shape, but who knows how much or how little wear they got.
Now I am thinking of maybe making a replacement for my quilt - I think I deserve it after all these years.