When you throw something away on a Mac the storage space will eventually be reclaimed. So why does Apple call it the "Trash" bin when what you really are doing is recycling?
Ooh, I like that. Composting would imply that the data is devolving back into its original components, but the same data is not used to make new data. I guess maybe it would be clearer if we knew what was being trashed; the storage medium, or the data.