Set aside the childish tone ...

> Dell is a single vendor that will diagnose and fix all of your hardware issues.

There are two anecdotes here disagreeing with you, and frankly that's enough to say what you said above isn't true, not universally so. I doubt Odixe is targeting big deployment like yours, but more like theirs. Whether they will succeed is another matter, but they do have a valid sales pitch and the expertise to pull it off.