My personal data center has been up and running, non-stop, since Flag Day. No, it's not all in one place. It's geographically diverse, living on six continents. It's also OS, hardware, network, and software diverse. I have redundancy fitted everywhere I can fit it. Overkill for a home system? Probably. But as a research platform, it's (mostly) tax deductible.
I guess you could call it a "private cloud", if you insist ... but I shun the entire "cloud"meme as a dumbed-down, marketing-speak variation of what is really what modern networking is capable of.
Third parties are NOT necessary for diverse data storage. Why anyone depends upon them is beyond me ...