I haven’t seen one in California since the last one I fell off of- about 1965.
The playgrounds now all have padding underneath for soft landings - not the sand or dirt we fell into. The elementary school near my home is ripping up the padding under their play equipment to put in even MORE padding.
Those kids won’t have scars like we did, which I proudly wear to this day.
We have a playground nearby that has the modern plastic equipment,
but they kept the old metal stuff as well...
Including that “griddle” of a metal slipper slide.
The playground nearest my house had dirt on the ground, and parents were tired of us coming home all muddy so the county put down blacktop!