I'm mostly talking about the "somebody else's computer" part in the comment I replied to. I don't think it's very feasible. I think self hosting stuff from home is awesome and think it's a culture more folks should check out, but to really have a proper backup of files they need to be stored in multiple different physical locations and that's not something that's cost effective for most folks. What you're talking about is still "someone else's computer" so not different from the comment above.