One flaw glossed over in the article is that having a nuclear reactor means your ship will be unable to visit many ports such as those unequipped to deal with,

One flaw glossed over in the article is that having a nuclear reactor means your ship will be unable to visit many ports such as those unequipped to deal with, say, a fire on a nuclear powered vessel. That's not even to mention general nuclear opposition such as New Zealand's outright ban on nuclear powered vessels.