Metal swing sets advantages:
Metal is relatively cheap compared to wood. If a swing component breaks, spare parts are relatively easy to obtain, and metal swing sets are easier and faster to assemble. And they are strong and last for many years. So playgrounds are mostly metal swing sets.
But metal swing sets also have disadvantages:
Metal swing sets bend or break easily and are not as strong as wood. Metal rusts easily and requires regular painting to maintain its original appearance.
wooden swing sets advantage:
Wooden swing sets are sturdy and durable. Support high weight capacity. And the design can be customized. Wood is long-lasting and will last for many years.
shortcoming:
Wooden swing sets require regular maintenance. Assembling a wooden swing set takes longer than a metal swing set. Bolts and nuts need to be tightened regularly to maintain a high level of safety.