Not sure why you got downvoted. I came here to say the same.

While it is in theory true that you cannot have a CA system, in practice if you control your H/W and data centers as well, you can build enough redundancy that a P is not more likely than (say) being hit by a meteor. So still not a CA system, but practically CA 99.9..% (add as many 9's as you have money).

Edit: Spelling.