> hardened against virtually all attacks Hardened? Have you tested it? This feature relies on obscurity for it's "security". > all attacks Also, stating that

> hardened against virtually all attacks Hardened? Have you tested it? This feature relies on obscurity for it's "security". > all attacks Also, stating that anything could be secure against "all" attacks is the kind of hubris that encourages complacency. > independent operating system That OS is monoculture[1], greatly increasing the utility of an exploit. > even if those machines have been compromised Only if you assume the builtin OS is magically secure. Intel/AMD have had many bugs in their products in the past. [1] really a small set of monocultures