I've always had problems with MWI, but it's just a gut feeling. I don't have the necessary specialized knowledge to be able to make a decent argument for or against it. I do concede it one advantage: it's a Copernican explanation, and so far Copernican explanations have a perfect record of having been right every time. Other than that, I find it irritating, most probably because it's the laziest plot device in science-fiction.
As per a recent comment this thread is meant to voice contrarian opinions, that is anything this community tends not to agree with. Thus I ask you to post your contrarian views and upvote anything you do not agree with based on personal beliefs. Spam and trolling still needs to be downvoted.