More importantly, the wooden beams created with modern processes are so big and solid that it actually takes enormously high temperatures to set them on fire — below those temperatures, the surface of the beam simply chars, while the beam itself maintains its structural integrity.

So, it's not really wood. It's a composite. It's a wood in a polymer it's epoxy resin. The resin is what chars.
How do the fasteners resist burning/charring? Same materials? What do they use for the elevator? Hemp? ;-)

"Steel is actually less fire resistant in its pure form," Snapp said. "When steel hits a certain temperature it starts melting, the connections break.".

Are there comparing this composite to early 20th century steel construction that want fireproofed? Also, steel conducts heat, and steel frame any like heat-sinks.

This is a cool idea, but it's still only theoretical. Would anytime buy a wooden car, or a wooden bicycle.