RE: As an example: Apple has done away with SECURE DELETE for Trash. I imagine there is some work-around within the OS using Terminal . . . BUT "Permanent Eraser" makes it so much simpler. It was easy to locate on Google, simple to download and install, and easy to use. Ta Da!
SSD drives and the SSD component of Fusion drives are capable of only a finite number of write operations. Because secure delete, whether provided by Apple or a third party app works by the simple expedient overwriting the erased data on the media several times it shortens the lifespan of the SSD media. (That is the same reason third party disk utilities caution against optimizing SSD or Fusion drives.) Additionally Apple's new
APFS file system, already fully implemented in iOS 10.3, has features that make secure erase and volume/file optimization essentially irrelevant and pointless.
Even though your MBP, and many others, still has
rotating rust media, Apple is always building for the next generation of devices it is reasonable for them to remove features from the OS that are dangerous or ill advised in the current and future hardware generations.
