Agreed.
Powering Down: Powering the unit down via the encoder suspends the active working state of the last-opened project. This process doesn’t save any data to disk; it is akin to the ‘hibernate mode’ found on laptops.
Losing Power: The active working state will be lost and the project will be loaded from disk. All unsaved data will be lost.
Temp Save: This is not saved to disk and will be lost after powering down.
Pattern Save: Long-press [FUNC] + [SETTINGS] to save the current pattern to disk. This is a partial save of the project to disk. If you close the project without saving at this point, the saved pattern will remain on disk, but you will lose all other unsaved data.
Project Save: Saving the project will store the active state of the entire project to disk (though Temp Saves cannot be stored).