It's vastly cheaper for them to helicopter in (figuratively, usually...) and replace a single drive when the stakes are minimal versus deal with cascading fallo

It's vastly cheaper for them to helicopter in (figuratively, usually...) and replace a single drive when the stakes are minimal versus deal with cascading fallout of multi-drive failures and data/system recovery. This level of support is common for most high-end hardware systems - all the big players do this, including IBM, Dell, etc.