On non-spinning-rust, even if it may be useful, it's probably not enough, as the data would only be erased when garbage collection kicks in. Of course, if the filesystem isn't mounted with `discard`, wiping instead of removing ensures that the blocks are deallocated instantly in the device's page table (rather than waiting for a scheduled trim). With non-spinning-rust, ensuring that the data is physically gone from the media has become harder : writing a firmware that is able to read deallocated pages is probably not that hard, especially for government agencies.