Every Vita/PS3 owner should have PS+ anyway. And PS+ allows for auto-uploads of the savegames. Pretty much a non-issue if you are a PS+ user.
That's a really silly argument though. I mean, I can easily see why PS+ is so attractive, but I'm not subscribed because I have enough games as it is. I don't need to subscribe to something to get more of what I already have.
It is a pain to deal with the Content Manager to copy over save files before you delete stuff. I don't understand why they decided to go this route, except maybe for the possibility to protect themselves from Custom Firmware.