Why is running multiple applications within a single process considered undesirable or risky?

Running multiple applications within a single process on Android is considered undesirable for several reasons:

• Isolation and stability: If one application crashes or causes an error, it can lead to the crash of the entire process, affecting other applications.
• Security: Sharing a single process increases the risks of data leaks between applications.
• Resource management: Android manages processes and memory, and combining applications into one process complicates efficient resource allocation.
• Debugging and monitoring: It is more difficult to track and diagnose issues when multiple applications run in one process.

Therefore, each application is usually launched in its own process to ensure stability, security, and ease of maintenance.