Comparison: Why Switch to Signals?

Why replace the tools you already use (C# EventHandler, UnityEvent, or Action)?

Feature	❌ C# Action	❌ C# EventHandler	❌ UnityEvent	✅ Signal
Exception Handling	Fails: If one listener crashes, the rest do not run.	Fails: If one listener crashes, the rest do not run.	Safe: Catches exceptions.	Safe: Logs errors, ensures all other listeners still run.
Threading	Unsafe: Crashes if UI is touched from a background thread.	Unsafe: Crashes if UI is touched from a background thread.	Unsafe: Must be called on Main Thread.	Auto-Sync: Can automatically marshal calls to the Main Thread.
Performance	Fast, but creates garbage on closure allocation.	Fast, but tons of EventArgs garbage.	Very slow (Reflection-based).	Fast: Zero-allocation invocation.
Debugging	Invisible: Can’t see listeners in Editor.	Invisible: Can’t see listeners in Editor.	Visible: But only if assigned in Editor, events registered in code are invisible.	Deep Profiling: View observer counts, heat-maps, and stats in Editor.