You get lots of benefit from permanently-trimmed space that is never used, even if it isn't explicitly "over-provisioned". The underlying storage always has lo

You get lots of benefit from permanently-trimmed space that is never used, even if it isn't explicitly "over-provisioned". The underlying storage always has lots of free space, and thus is likely to have A) lots of pre-erased pages, and thus B) doesn't need to relocate as much stuff often to make contiguous chunks to erase, and thus C) write amplification is much lower.