Thats definitely true, but the timescale of which ultimate failure happens is critical. With billions of buildings on the planet if poor maintenance was such a

Thats definitely true, but the timescale of which ultimate failure happens is critical. With billions of buildings on the planet if poor maintenance was such a major and primary risk factor materializing on a 40yr timespan I would expect many more buildings collapsing left and right. People can downvote my comment all they want, there will be a in-depth inquiry here and I will be surprised if it doesn't somehow transpire there was some pre-existing risk that precipitated events...