User blog comment:JustSomeDude.../"There is a man I must kill!"/@comment-1940096-20140719024237/@comment-5115277-20140722162739

The point was that there's nothing special about being stabbed in the heart compared with several things causing certain death in reality, that don't in the One Piece world.

Enel was rejected through the heart while affected by seastone, then restarted it.

Nothing stopping Monet putting herself into a cryogenically frozen state with her DF so that she can be recovered later on.