Neglect

What happens to a tennis court when it's neglected? When nobody maintains it? That depends upon the surface.

Here's a hard court after five to ten years of neglect.

 Here's a clay court. Not sure how long this one's been neglected. Probably not more than a few years.

And here's the world famous Stonegate Academy after roughly thirty years of neglect.

Stonegate's still playable, among the best courts in the area.

Why do people install hard courts and clay courts again?