Another way to use up disk space and push cloudification. In addition to all the concerns already listed.
You would think a trillion-dollar company could use its resources to build something useful and move the technology forward with something like a new file system with versioning or a global file system, or updates that don't require a restart, maybe immutability of some sort, something useful for a change.
Instead their breakthrough feature is a tool that takes a screenshot every few seconds and fills up the drive space, sigh. And they even couldn't get that right on the first try, the first version was a privacy nightmare.