Many worlds or many words?

In 1998 Max Tegmark wrote a paper with the great title, The Interpretation of Quantum Mechanics: Many worlds or many words. He suggested that the validity of different interpretations of quantum theory cannot be decided empirically, but are:

“purely a matter of taste, roughly equivalent to whether or not one believes mathematical language or human language to be more fundamental.”

But it is interesting that he is now writing articles about multiverses...