It's unlikely survivor bias - Montreal is full of really shitty build "plexes" for example. They are not falling apart - there is a 'brick works' for them - rem

It's unlikely survivor bias - Montreal is full of really shitty build "plexes" for example. They are not falling apart - there is a 'brick works' for them - remove whole brick facade and redo it again. Those "plexes" are rarely torn down in fact. At the same time bank buildings on the same street are very sturdy and never seen 'brick works' since the birth. I tend to think 'plexes' used to be cheap [and crap] and banks, factories [but not schools!] are expensive and good. Construction errors on those 'plexes' are abundant and repeated over and over in today's plexes, yet those are OK with building codes.