What limitations may arise when using extensions in a system?

When using extensions in iOS, the following limitations exist:

• Limited resources: extensions operate in a restricted environment with limitations on memory and execution time.
• Limited access to APIs: not all APIs are available in extensions; for example, access to certain system functions or background tasks may be prohibited.
• Data isolation: extensions do not have direct access to the main application's data; shared containers (App Groups) must be used for data exchange.
• UI restrictions: extensions have a limited user interface and cannot launch full applications.

These limitations must be considered when designing extensions to ensure correct and efficient operation.