A lot of the comments here are assuming that the author is proposing something that he is not (perhaps making this assumption from reading the title not the article itself). So I'll summarize. He's arguing that rebuilding the internal structure of the roof with wood beams would inevitably lead to another fire. Concrete and steel would last longer and be more structurally stable and resilient to fires. What he's not a…
But one long standing issue we keep running across is how to fight fires in high buildings is an area that could do with some financial and invitation. Until then - sprinkler systems for such buildings should be a priority.