Not all MD-11 crashes have ended up on their back though? As far as i can remember there have been 3.
1. FedEx N611FE in EWR
2. China 642/Mandarin in HKG (landing in a typhoon and maybe shouldn't have been) and
3. FedEx N526FE in NRT.
That's 3 since service introduction. Is that "excessive" in the terms of becoming an aircraft "habit"?