Actually knowing your vendor will be upfront and wear their mea culpa in public rather than behind legalese (cough vtech) means that it is a culture of learning from your mistakes rather than shoving it under the blanket or finding some rogue engineers to blame (cough VW).
Now here is where I should feel smug for internally housing our SVN but I suspect that any outage we may suffer will be quickly blamed on some SAN or switch or someone else.