The flaws in an earlier design can't be a justification for absence of upgrade. Since 1960 we had build thousands of structures higher than 150m. Skyscrapers are not exactly a novely. We have the tools and the knowledge.

They had 51 years, 51! to raise a damned wall 20 m. Had all the new information, improved models, latest computers and warnings... and they didn't do anything. Neither Tesco, nor the Japanese government were able to see it coming. Their lack of vision is really infuriating.