Android - Why not to use a task killer

Looks like task killers on android are not recommended:

- By killing an app with a task killer, you remove the state information for that app, meaning the app has to be opened fully the next time you use it, instead of loading from where it was, thus using more battery.

- It also leads to possible instability by killing processes that may be shared by different apps.
- Android is smart enough to handle memory allocation.

via Droid Den:
http://www.droid-den.com/android-guides/android-guide-should-i-use-a-task-killer