1. The obvious--backup. I trash something and realize three days later I shouldn't have trashed it. With Trash Cache I can go back as far as I specify (I use 1 week) and retrieve an item. Kind of like a trash history.

2. "Holding" folder. When I'm deciding whether I want something trashed or not I have the option, "if I don't use it in a week, then I don't need it." I trash it and forget about it. If I decide I need it, I grab it out of the Trash Cache. Kind of like a "someday/maybe" with a purge date.

3. Backups for application updates. Whenever I install an update to an application, I usually archive the current version "just in case". No need with Trash Cache. Just trash the current version and I've got a week (with my settings) to see if the update will behave properly. Trash the current version of the updated app and forget about it.

4. Security. All of my trash is securely deleted. When the 1 week limit has lapsed for an item, Trash Cache overwrites it with random data before permanently deleting it.

5. Aesthetics. I can't stand seeing the trash icon full so I'm always emptying the trash which just adds up to a lot of keystrokes that could be avoided. Trash Cache takes care of the part where I would use mental energy deciding if I should really trash an item knowing it will be gone for good. Once I've emptied the trash It gets rid of the stress that I may have made a mistake and will need that item again soon. To prevent the full trash icon, I attached a folder action that automatically empties the trash when an item is added.

It really does take away some stress.