My family invested in a jungle-gym when I was a kid. We were lucky. The slide was wood with a thin wax coating. It lasted about one year in that region, baking in one season, swelling in another, freezing and thawing in the other two, until it became a splinter distributor and we never used it again.
For the metal slides, however, lying on a skateboard + metal slide = somehow never broke a bone.
I’m not reading the article but instead trying to be amusing. If it breaks the reality, please put me in a new one with really good scotch, healthy knees, and a spirit of adventure!