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Actually timber has a nice property of loosing strength gradually and slowly in case of fire, giving time for people to escape. Steel and concrete reinforced structures tend to collapse when a certain temperature is reached.

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Steel and concrete buildings need a huge amount of time to get fires spread enough and hot enough to collapse, except in freak catastrophes like jet plane crashes.

It's a well known and not uncommon failure mode:

https://youtu.be/8XMTALBYRNA?t=40

https://youtu.be/LB9wwTmrMYA?t=15

Fireproofing steel beams has been practiced since the 1950s. (https://www.asbestos.com/products/fireproofing-fire-preventi...)

Yes, but my point was that after a "routine" fire the building might be declared weakened and require big overhauls or teardown, whereas a traditional apt building can stroll through many small/moderate fires. Because eg a 50 apartemnt building over 100 years is likely to experience many fires. This may impact investoe expected roi and/or insurance costs.

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