What are the real world use cases of proxy?

Proxies are not used in regular day to day JavaScript work but they enabled many exciting programming patterns. Some of the real world use cases are listed below,

1. Vue3 used proxy concept to implement reactive state
2. SolidJS implemented reactive stores
3. Immerjs built upon proxy to track updates to immutable updates
4. ZenStack improved Prisma ORM for access control layer