I've just done this shed's first good clear out since new 20 years' ago. The possibly useful at some future time offcuts have all been jettisoned, accumulations and collections carefully sorted and most of them taken to the tip. The shed is now up and running with tools at the ready and space to work.
The shed in the background is my wife's. She keeps her lady stuff for boot sales in there and her book overflow.
The sheds are both 20 years old and still completely weatherproof.