Ships are designed with the concept of compartmentalization in mind.  Compartmentalization means that any damage to any part of the ship is isolated to the damaged area; the ship continues to function and fight unless and until a catastrophic level of damage is created.

Thus, because of the interstate compartmentalization provided by the Electoral College, Bush v. Gore stayed confined to Florida and did not affect the outcome in the other 49 states.  Likewise, the fact that, in the 2008 election, Missouri's results were so close that they didn't report the winner until two weeks later (it ultimately went to McCain by a 0.14% margin) didn't affect the rest of the election.

The NPVIC does away with this compartmentalization feature, and thus any problems will be amplified nationwide by the fact that the popular vote, not the electoral vote, is the ultimate decider.