[pas]

but it fails gracefully, right? (only one engine fails at a time)

it's like RAID, great until the RAID card itself fails

[aidenn0]

It's probably most like losing power in a single cylinder; the effects vary from engine to engine.

[jacquesm]

They tend to seize and when they do and you gang them they'll likely break stuff in the other ones unless you add a freewheel or some other luxury like that.